Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png +443456003478 https://www.design911.co.uk Facebook Instagram
Porsche specialists based in the UK
Porsche > 911 & 912 (1965-1989) > 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F) > Engine Rebuild Parts >

Direct-to-Head Throttle Bodies

Direct-to-Head Throttle Bodies

Filter by brand
DISPLAYING 1 to 4 (of 4 products)
Accessories Kit for the Rennen Roller Barrel ITB Upgrade. Porsche 911
10
Accessories Kit for the Rennen Roller Barrel ITB Upgrade. Porsche 911
ITBACCESSORIESKIT
Product Information
Product Information

Accessories Kit for Roller Barrel ITB Upgrade

The Rennen by JSR Roller Barrel ITB Accessories Kit is the complete engine management and sensor package designed to support a professional Roller Barrel Individual Throttle Body (ITB) conversion. This comprehensive kit contains all of the critical sensors, brackets, vacuum components and trigger wheel hardware required to allow a modern standalone ECU to accurately monitor and control your Porsche 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

While the Roller Barrel Throttle Bodies provide the airflow and throttle response benefits of the conversion, the accessories kit provides the information the ECU needs to operate the engine correctly. Without these supporting components, the ECU cannot accurately determine engine position, throttle opening, manifold pressure or cylinder synchronisation.

This kit has been specifically developed to complement the Rennen by JSR Roller Barrel ITB system and provides a convenient, matched solution for builders seeking maximum performance, drivability and reliability.

What's Included?

The kit includes:

  • 1 x MAP Sensor
  • 1 x Throttle Position Sensor (TPS)
  • 1 x Crankshaft Position Sensor (CPS)
  • 1 x Camshaft Position Sensor (CMP)
  • 1 x Camshaft Position Sensor Mounting Bracket
  • 1 x Crankshaft Position Sensor Mounting Bracket
  • 1 x Crankshaft Position Trigger Wheel
  • 1 x Vacuum Manifold
  • 1 x Vacuum Manifold Tubing & Fittings Kit

Together these components provide the ECU with the information required to deliver precise fuel and ignition control.

What Does Each Component Do?

MAP Sensor
The Manifold Absolute Pressure (MAP) Sensor measures intake vacuum and engine load. This allows the ECU to calculate fuel delivery requirements and optimise ignition timing.

Benefits include:

  • Accurate load sensing
  • Improved fuel mapping
  • Better drivability
  • Enhanced engine efficiency

Throttle Position Sensor (TPS)
The TPS measures throttle opening angle and tells the ECU how much driver demand is being applied.

Benefits include:

  • Instant throttle response
  • Improved acceleration enrichment
  • Precise throttle mapping
  • Enhanced drivability

Crankshaft Position Sensor (CPS)
The CPS monitors crankshaft speed and position, providing the ECU with its primary engine timing reference.

Benefits include:

  • Accurate ignition timing
  • Reliable engine synchronisation
  • Stable engine operation
  • Improved performance

Camshaft Position Sensor (CMP)
The Camshaft Position Sensor identifies which cylinder is on its firing cycle, allowing sequential fuel injection and advanced ignition strategies.

Benefits include:

  • Sequential fuel injection
  • Improved cold starts
  • Enhanced engine efficiency
  • More accurate ECU control

Sensor Mounting Brackets
The dedicated sensor brackets provide precise positioning for both the crankshaft and camshaft sensors, ensuring accurate and reliable signal generation.

Benefits include:

  • Correct sensor alignment
  • Reliable signal quality
  • Professional installation
  • Long-term durability

Crankshaft Position Trigger Wheel
The trigger wheel provides the reference teeth required by the crankshaft sensor to determine engine speed and position.

Benefits include:

  • Accurate RPM monitoring
  • Reliable ECU synchronisation
  • Precision ignition control
  • Essential EFI functionality

Vacuum Manifold & Fittings Kit
The vacuum manifold combines vacuum signals from each throttle body into a stable source for the MAP sensor and other vacuum-operated systems.

Benefits include:

  • Stable vacuum signal
  • Improved ECU load calculations
  • Enhanced tuning accuracy
  • Complete installation solution

Why Are These Components Required?
Roller Barrel Throttle Bodies significantly increase airflow and throttle response, but they require modern engine management to fully exploit their potential.

The ECU relies on these sensors and supporting components to:

  • Control fuel injection
  • Calculate engine load
  • Monitor engine position
  • Control ignition timing
  • Support idle stability
  • Deliver smooth drivability
  • Maximise performance

Without these inputs, the ECU cannot operate correctly.

Why Are Roller Barrel ITB Upgrades So Popular?

Rennen by JSR Roller Barrel Throttle Bodies are one of the most advanced induction upgrades available for Porsche engines.

Benefits include:

  • Exceptional throttle response
  • Increased airflow capacity
  • Improved engine breathing
  • Greater power potential
  • Enhanced torque delivery
  • Distinctive induction sound
  • Motorsport-inspired engineering
  • Stunning engine bay presentation

When paired with the correct engine management components, they deliver a driving experience unlike any conventional intake system.


Megaflow Air Filteration Kit 911 3.2/ 964/993 Electronic Fuel Injection (EFI) Throttle Bodies - 102-102-00241-01
2
Megaflow Air Filteration Kit 911 3.2/ 964/993 Electronic Fuel Injection (EFI) Throttle Bodies
102-102-00241-01
Product Information
Product Information
Air Filtration System - Includes Megaflow Air Filters complete with brushed aluminium pre-drilled Filter back plates.

Please note each set is made to order allow 6 - 8 weeks

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

102-102-00241-01
102-102-00241-01

The product you are viewing cross references to these numbers
Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr
14
Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr
ITB302BOLTITGSET
Product Information
Product Information

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.

Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr
14
Roller Barrel ITB Upgrade Set for 2 Stud Manifold. Porsche 911 3.0ltr
ITB302BOLTSET
Product Information
Product Information

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.


DISPLAYING 1 to 4 (of 4 products)
About Direct-to-Head Throttle Bodies

Direct-to-Head Throttle Bodies – Ultimate Airflow, Precision Response & Motorsport-Level Performance

Direct-to-head throttle bodies (ITBs) are one of the most effective performance upgrades available for naturally aspirated and high-revving Porsche engines. By mounting the throttle body directly to the cylinder head—eliminating long intake runners and restrictive manifolds—these systems deliver exceptional throttle response, increased airflow, and improved cylinder-to-cylinder distribution. The result is sharper power delivery, improved mid-range torque, enhanced high-RPM breathing and motorsport-grade drivability.

Ideal for performance rebuilds, custom tuning projects, classic Porsche upgrades, or engines converted to standalone engine management, direct-to-head throttle bodies offer the crisp response and induction noise that enthusiasts and engine builders seek.

What Direct-to-Head Throttle Bodies Do

Direct-to-head throttle body systems deliver a range of performance advantages:

  • Improve throttle response by reducing intake tract volume
  • Increase airflow velocity for better cylinder filling
  • Enhance high-RPM performance with individual, unrestricted throttle passages
  • Support precise air-fuel tuning for standalone ECU systems
  • Provide equal air distribution to all cylinders
  • Allow fine adjustment of idle and synchronization for optimal smoothness
  • Enable aggressive camshaft profiles thanks to freer airflow
  • Deliver iconic ITB induction sound for enthusiast-grade driving engagement

These systems transform the engine’s character, making it more responsive, tunable and performance-oriented.

Why Throttle Bodies Fail Over Time

Throttle bodies in both stock and performance engines are exposed to constant movement, fuel vapour, heat and air contaminants. Common reasons for failure include:

  • Worn throttle shafts causing air leaks or inconsistent idle
  • Carbon buildup affecting plate movement or airflow
  • Cracked housings due to heat cycling or age
  • Vacuum leaks at mounting points or seals
  • Damaged linkage systems leading to uneven throttle opening
  • Bearing wear in performance or high-mileage applications
  • Electronic actuator failures in electronically-controlled units

Symptoms include rough idle, hesitation, uneven cylinder behaviour, poor throttle response or tuning difficulty.

Why You Should Replace or Upgrade to Direct-to-Head Throttle Bodies

Upgrading to precision-machined, performance-engineered direct-to-head throttle bodies provides immediate improvements in responsiveness, tuning capability and engine performance.

Key benefits:

  • Sharper and more immediate throttle response
  • Increased horsepower and torque through improved breathing
  • Smoother airflow and better cylinder balancing
  • More efficient combustion and improved drivability
  • Greater compatibility with performance cams and standalone
  • ECUs Enhanced durability with motorsport-grade materials
  • Reduced intake restriction and improved volumetric efficiency
  • Future-proofing for tuned or rebuilt Porsche engines

These systems are ideal for anyone seeking motorsport behaviour on the road or track.

You may also like
Popular Models