do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
.jpg?width=440&height=320 "Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr")
.jpg){kind=link}
- 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 with ITG Normal Air Filter Set
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, ITG foam 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
- ITG filters - Rennen normal version
- 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.