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.jpg?width=440&height=320 "Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr")
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- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Individual Roller Barrel Throttle Bodies (ITB) Upgrade for Modified 3.0ltr Engine
Unlock the full performance potential of your modified
air-cooled flat-six with the Rennen by JSR Individual Roller Barrel Throttle
Body (ITB) Upgrade, engineered specifically for a modified Porsche 911 3.0ltr engine featuring 41mm inlet ports. Combining advanced roller barrel induction
technology with stunning motorsport-inspired aesthetics, this complete system
is designed for enthusiasts seeking the ultimate throttle response, induction
sound and driver engagement.
Fits:
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Finished in premium gunmetal, this package includes beautifully machined silver velocity stacks, classic mesh air filters and a precision-engineered mechanical throttle linkage system. The result is a visually striking induction setup that delivers both exceptional performance and a period-correct motorsport appearance.
Whether installed on a modified road-going Porsche, fast-road build, restomod or dedicated competition engine, the Rennen by JSR Roller Barrel ITB system transforms the way the engine responds and feels throughout the rev range.
What Makes Roller Barrel Throttle Bodies Different?
Unlike conventional butterfly throttle bodies, Roller Barrel Throttle Bodies utilise a rotating cylindrical barrel to control airflow. This design creates a smoother and less restrictive airflow path when compared to traditional throttle plates.
Advantages of Roller Barrel technology include:
- Reduced airflow restriction
- Improved airflow efficiency
- Faster throttle response
- Enhanced cylinder filling
- Reduced turbulence
- Increased performance potential
- Motorsport-derived induction technology
This design has been used in high-level racing applications for decades and is widely regarded as one of the most effective naturally aspirated induction systems available.
Why Upgrade to Individual Roller Barrel Throttle Bodies?
Individual throttle bodies provide each cylinder with its own dedicated airflow path, allowing the engine to breathe more efficiently and respond immediately to throttle inputs.
Benefits include:
- Instant throttle response
- Sharper engine acceleration
- Improved airflow distribution
- Increased induction efficiency
- Enhanced engine character
- Greater tuning flexibility
- Improved performance potential
- Exceptional induction sound
For modified Porsche 911 3.0 engines with 41mm intake ports, the combination of optimised port sizing and individual roller barrel throttle bodies helps maximise the effectiveness of other engine modifications.
Motorsport Appearance with Premium Components
The Rennen by JSR package has been designed to look every bit as impressive as it performs.
Included within the system are:
- Gunmetal-finished roller barrel throttle bodies
- Precision-machined silver velocity stacks with ID of 45mm and height of 120mm
- Classic motorsport-style mesh air filters
- Mechanical throttle linkage assembly
The result is a visually stunning engine bay inspired by the legendary Porsche racing engines of the 1960s, 1970s and 1980s.
Mechanical Throttle Linkage for Pure Analogue Feel
A precision mechanical throttle linkage provides a direct connection between the accelerator pedal and the throttle bodies.
Benefits include:
- Immediate throttle actuation
- Exceptional pedal feel
- Accurate throttle modulation
- Direct driver feedback
- Enhanced engine response
- Traditional analogue driving experience
For enthusiasts who value mechanical connection and involvement, the linkage system delivers the authentic feel that makes air-cooled Porsche driving so rewarding.