Roller Barrel ITB Upgrade Set for 3 Stud Manifold. Porsche 964 3.6ltr  ❭  ITB363BOLTSET

Individual Throttle Bodies (ITB) Upgrade - 3 Stud Inlet Manifold

Transform the character, responsiveness and visual appeal of your air-cooled Porsche with the Rennen by JSR Individual Roller Barelle Throttle Bodies (ITB) Upgrade for the Porsche 964 3.6ltr engine. Finished in a striking gunmetal coating and supplied with silver velocity stacks, classic mesh air filters, fuel rails machined for EV6 injectors and a precision-engineered mechanical throttle linkage system, this package delivers a perfect blend of motorsport-inspired performance and timeless Porsche styling.

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

Unlike conventional butterfly throttle body systems, Roller Barrel Throttle Bodies utilise a rotating barrel mechanism that provides an unobstructed airflow path at wide-open throttle. This design has its roots in top-level motorsport and is widely regarded as one of the most responsive and visually impressive induction systems available for naturally aspirated engines.

For Porsche enthusiasts seeking the ultimate driving experience, the Rennen by JSR Roller Barrel ITB system offers a combination of performance, sound and aesthetics that transforms the character of the Porsche 964 3.6ltr

What Makes Roller Barrel Throttle Bodies Special?

Traditional throttle bodies use butterfly plates that partially obstruct airflow even when fully open. Roller Barrel Throttle Bodies utilise a cylindrical rotating barrel that creates a straighter and less restrictive airflow path.

The result is:

• Exceptional throttle response
• Improved airflow efficiency
• Reduced airflow turbulence
• Enhanced engine breathing
• Increased performance potential
• Smoother airflow characteristics
• Motorsport-inspired induction technology

Roller barrel systems are renowned for delivering an incredibly direct connection between throttle input and engine response.

Why Upgrade to Individual Roller Barrel Throttle Bodies?

The Porsche 964's air-cooled flat-six engine responds exceptionally well to individual throttle body induction systems.

With each cylinder receiving its own dedicated airflow source, engine responsiveness is transformed.

Benefits include:

• Instant throttle response
• Sharper acceleration feel
• Improved airflow distribution
• Increased induction efficiency
• Enhanced engine character
• Greater tuning flexibility
• Improved driver engagement
• Distinctive motorsport induction sound

The combination of Roller Barrel technology and individual throttle bodies creates one of the most desirable induction upgrades available for the Porsche 964 platform.

Motorsport Styling with Premium Engineering

The Rennen by JSR Roller Barrel ITB package is designed to look as impressive as it performs.

Featuring:

• Premium gunmetal-finished throttle bodies
• Silver velocity stacks
• Classic mesh air filters
• Precision mechanical throttle linkage

The result is a visually stunning engine bay that captures the appearance of classic Porsche race engines while incorporating modern engineering and manufacturing standards.

Mechanical Throttle Linkage for Maximum Driver Engagement

Included with the system is a precision-engineered mechanical throttle linkage assembly.

Unlike electronic (drive by wire) throttle systems, the mechanical linkage provides:

• Direct throttle actuation
• Exceptional pedal feel
• Immediate engine response
• Accurate throttle modulation
• Pure analogue driving feedback
• Motorsport-inspired control

This direct mechanical connection is a key element of the driving experience and one of the reasons enthusiasts favour traditional ITB systems.