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Rennen Plus
Rennen Plus – Porsche Individual Throttle Body Systems
Rennen Plus specialises in premium Individual Throttle Body (ITB) systems developed for Porsche enthusiasts seeking sharper throttle response, improved drivability and enhanced engine performance. Rennen Plus combines precision engineering with motorsport-inspired technology to deliver high-quality induction solutions for air-cooled and classic Porsche applications.
Rennen Plus ITB systems provide each cylinder with its own dedicated throttle body, improving airflow efficiency and delivering faster throttle response, greater tuning flexibility and the distinctive induction sound Porsche performance enthusiasts love.
Ideal for EFI conversions, engine rebuilds, fast-road applications and motorsport projects, Rennen Plus products are trusted by Porsche owners and performance engine builders worldwide.
Porsche Individual Throttle Bodies & Performance Induction Systems
Design911 offers a range of Rennen Plus ITB systems designed to maximise engine responsiveness and performance. Individual throttle body conversions are among the most effective upgrades for naturally aspirated Porsche engines, providing improved airflow, sharper acceleration and enhanced driver engagement.
Benefits of Porsche ITB Systems
- Improved throttle response
- Enhanced airflow efficiency
- Increased tuning flexibility
- Improved engine sound
- Ideal for EFI conversions
- Suitable for road, track and motorsport use
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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Rennen ITBs for Air-Cooled Porsche 964 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 964 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake
manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
3 bolt inlet manifold to cylinder head mounting
50mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Rennen ITBs for Air-Cooled Porsche 964 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 964 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake
manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
3 bolt inlet manifold to cylinder head mounting
48mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Rennen ITBs for Air-Cooled Porsche 911 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 911 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake
manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
2 bolt inlet manifold to cylinder head mounting
48mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Rennen ITB Black Velocity Stacks for Air-Cooled Porsche 911 - Set of 6
Precision-Engineered Velocity Stacks Designed Exclusively for Rennen ITBs
Rennen ITB Velocity Stacks have been specifically developed
for use with the innovative Rennen ITB by JSR roller barrel throttle body
system. Designed to maximise airflow efficiency and complement the advanced
induction characteristics of the Rennen ITB, these premium velocity stacks help
optimise engine breathing, improve airflow stability and support maximum
performance from your air-cooled Porsche 911 engine.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Manufactured to exacting standards and available in both silver and black finishes, these velocity stacks provide the perfect finishing touch for high-performance Porsche engine builds, restomods, track cars and motorsport applications.
Available Sizes and Engine Size Combinations
Each velocity stack features an overall length of 120mm
and is available in three internal diameter options to suit a variety of engine
specifications and performance requirements:
- 2.7ltr / 3.0ltr Engine - 45mm Internal Diameter (ID)
- 3.2ltr / 3.5ltr / 3.6ltr Engine - 48mm Internal Diameter (ID)
- 4.0ltr Engine - 50mm Internal Diameter (ID)
These sizing options allow engine builders and tuners to select the most suitable intake configuration based on engine displacement, camshaft profile, intended RPM range and performance objectives.
Optimised Airflow Performance
The carefully designed bellmouth entry profile promotes smooth airflow into the throttle body, helping reduce turbulence and improve air velocity. This allows the induction system to operate more efficiently throughout the rev range while maintaining the sharp throttle response that the Rennen ITB system is renowned for.
By creating a smoother transition for incoming air, Rennen Velocity Stacks contribute to improved cylinder filling and consistent airflow delivery across all cylinders.
Premium Construction
Designed to match the quality and engineering standards of the Rennen ITB system, these velocity stacks offer exceptional durability and an outstanding motorsport-inspired appearance.
Key Features
- Designed exclusively for Rennen ITBs by JSR
- Available in silver or black finish 120mm overall length
- Available in 45mm, 48mm and 50mm internal diameters
- Precision-machined construction
- Optimised bellmouth profile for improved airflow
- Supports enhanced induction efficiency
- Complements Rennen roller barrel throttle body systems
- Suitable for road, track and race applications
- Designed for air-cooled Porsche 911 performance engines
The Perfect Addition to Your Rennen ITB Installation
Whether you are building a fast-road Porsche 911, a high-performance restomod, or a dedicated motorsport engine, Rennen ITB Velocity Stacks provide the ideal airflow solution for your induction system. Designed specifically to work with the Rennen roller barrel throttle bodies, they help deliver the performance, drivability and appearance expected from a premium Porsche performance upgrade.
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Rennen ITB Silver Velocity Stacks for Air-Cooled Porsche 911 - Set of 6
Precision-Engineered Velocity Stacks Designed Exclusively for Rennen ITBs
Rennen ITB Velocity Stacks have been specifically developed
for use with the innovative Rennen ITB by JSR roller barrel throttle body
system. Designed to maximise airflow efficiency and complement the advanced
induction characteristics of the Rennen ITB, these premium velocity stacks help
optimise engine breathing, improve airflow stability and support maximum
performance from your air-cooled Porsche 911 engine.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Manufactured to exacting standards and available in both silver and black finishes, these velocity stacks provide the perfect finishing touch for high-performance Porsche engine builds, restomods, track cars and motorsport applications.
Available Sizes and Engine Size Combinations
Each velocity stack features an overall length of 120mm
and is available in three internal diameter options to suit a variety of engine
specifications and performance requirements:
- 2.7ltr / 3.0ltr Engine - 45mm Internal Diameter (ID)
- 3.2ltr / 3.5ltr / 3.6ltr Engine - 48mm Internal Diameter (ID)
- 4.0ltr Engine - 50mm Internal Diameter (ID)
These sizing options allow engine builders and tuners to select the most suitable intake configuration based on engine displacement, camshaft profile, intended RPM range and performance objectives.
Optimised Airflow Performance
The carefully designed bellmouth entry profile promotes smooth airflow into the throttle body, helping reduce turbulence and improve air velocity. This allows the induction system to operate more efficiently throughout the rev range while maintaining the sharp throttle response that the Rennen ITB system is renowned for.
By creating a smoother transition for incoming air, Rennen Velocity Stacks contribute to improved cylinder filling and consistent airflow delivery across all cylinders.
Premium Construction
Designed to match the quality and engineering standards of the Rennen ITB system, these velocity stacks offer exceptional durability and an outstanding motorsport-inspired appearance.
Key Features
- Designed exclusively for Rennen ITBs by JSR
- Available in silver or black finish 120mm overall length
- Available in 45mm, 48mm and 50mm internal diameters
- Precision-machined construction
- Optimised bellmouth profile for improved airflow
- Supports enhanced induction efficiency
- Complements Rennen roller barrel throttle body systems
- Suitable for road, track and race applications
- Designed for air-cooled Porsche 911 performance engines
The Perfect Addition to Your Rennen ITB Installation
Whether you are building a fast-road Porsche 911, a high-performance restomod, or a dedicated motorsport engine, Rennen ITB Velocity Stacks provide the ideal airflow solution for your induction system. Designed specifically to work with the Rennen roller barrel throttle bodies, they help deliver the performance, drivability and appearance expected from a premium Porsche performance upgrade.
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Rennen ITBs for Air-Cooled Porsche 911 - Advanced Roller Barrel Individual Throttle Bodies
The Rennen ITBs by JSR represent the next generation of
individual throttle body technology for air-cooled Porsche 911 engines.
Designed and engineered specifically to extract optimal performance from
classic Porsche flat-six engines, these innovative roller barrel throttle
bodies deliver exceptional airflow, sharper throttle response, and improved
engine efficiency compared to conventional butterfly valve throttle body
systems.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Developed through extensive research, flow simulation analysis and real-world testing, the Rennen ITB system provides a premium induction solution for performance-focused Porsche enthusiasts, restorers, track-day drivers and motorsport applications.
Whether you are building a high-performance Porsche 911 engine or converting a classic air-cooled Porsche to modern EFI, Rennen ITBs by JSR offer a significant advancement in intake technology.
Why Choose Rennen Roller Barrel ITBs?
Unlike traditional individual throttle bodies that utilise a butterfly valve positioned directly in the airflow path, the Rennen ITB system features a precision-engineered tapered roller barrel design.
This innovative approach provides several key advantages:
Unrestricted Airflow
The roller barrel design eliminates the butterfly valve obstruction found in conventional throttle bodies. With no throttle plate disrupting airflow, air moves more efficiently into the engine, improving volumetric efficiency and overall performance.
Increased Air Velocity
Because there is no butterfly valve occupying space within the throttle bore, the throttle body diameter can be optimised to maintain higher air velocity. Higher intake air speed promotes superior cylinder filling and enhanced engine response throughout the rev range.
Superior Fuel Atomisation
At partial throttle openings, airflow passes directly over the fuel injector. This promotes exceptional atomisation of the air-fuel mixture, improving combustion efficiency, drivability and throttle progression.
Instant Throttle Response
The short distance between the roller barrel and the inlet valve creates a highly responsive induction system, delivering immediate engine response and a direct connection between driver input and engine output.
The ITB kit comes with the ITBs mounted on intake manifolds and with fuel rails made for the EV6 injector type.
Advanced Flow Simulation & Development
Extensive computational fluid dynamics (CFD) analysis and development testing have been carried out to optimise every aspect of the Rennen ITB design.
Flow simulation data demonstrates:
- Direct airflow over the fuel injector during part-throttle operation.
- Significantly reduced turbulence around the injector area compared to traditional butterfly throttle bodies.
- Up to 20% less airflow restriction at full throttle when compared with conventional ITB systems.
- Improved airflow consistency across all cylinders for enhanced engine balance and performance.
The result is a highly efficient induction system capable of supporting both fast road and high-performance motorsport applications.
Premium Motorsport-Grade Construction
Every Rennen ITB by JSR system is manufactured to the highest standards using precision CNC machining and premium materials.
Precision CNC Machined
All components are machined from high-grade 6082-T6 aluminium to ensure exceptional dimensional accuracy and durability.
Perfect Airflow Distribution
Tight manufacturing tolerances ensure evenly distributed airflow across all throttle bodies, promoting balanced cylinder performance and simplified engine tuning.
Easy Synchronisation
The robust design incorporates minimal joints and connections, allowing straightforward throttle synchronisation and reducing the need for ongoing adjustment.
Long-Term Reliability
Throttle barrels are mounted within sealed ball bearings for smooth operation, durability and long service life under demanding conditions.
Premium Sealing Technology
All sealing surfaces utilise Viton O-rings to prevent false air entry and maintain optimal engine performance.
Quality Components Throughout
Only premium bearings, rod ends and stainless-steel fasteners are used throughout the assembly, ensuring reliability and durability in both road and track environments.
Hard Anodised Finish - Available in Gun Metal or Black Finish
All aluminium components receive a hard anodised gunmetal
grey finish, providing corrosion resistance and an attractive
motorsport inspired appearance.
Specification
Fuel Rails machined for EV6 injector type
2 bolt inlet manifold to cylinder head mounting
45mm velocity stack ID
120mm velocity stack length
The Ultimate Porsche Individual Throttle Body Upgrade
For enthusiasts seeking the ultimate air-cooled Porsche induction system, Rennen ITBs by JSR combine cutting-edge engineering, advanced airflow technology and premium construction quality. The innovative roller barrel design delivers exceptional throttle response, improved airflow efficiency, enhanced fuel atomisation and proven performance gains.
Upgrade your Porsche 911 with one of the most advanced individual throttle body systems available and experience a new level of engine responsiveness, drivability and performance