Tube and Fitting Set for Rennen ITB Vacuum Manifold. Porsche 911 / 964  ❭  ITBVT911964

Rennen Vacuum Fittings & Tube Set for Use with Rennen Vacuum Manifold

Complete your Porsche Barrel Individual Throttle Body conversion with the Rennen Vacuum Fittings & Tube Set, specifically engineered for use with the Rennen by JSR Vacuum Manifold. This installation kit provides the vacuum fittings, connectors and tubing required to correctly link each throttle body to the vacuum manifold, ensuring a stable and reliable vacuum signal for engine management and ancillary 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
• 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

Designed exclusively for Rennen by JSR Barrel ITB systems, this kit forms an essential part of the overall induction and engine management package. By combining the vacuum signals from each individual throttle body, the system creates a stable vacuum source that can be used for MAP sensors, fuel pressure regulators, idle control strategies and other engine management functions.

For any EFI-controlled Individual Throttle Body conversion, achieving a consistent vacuum signal is critical to drivability, tuning accuracy and overall engine performance.

What Does the Vacuum Fittings & Tube Set Do?

Individual throttle body systems generate vacuum independently from each intake runner. Because these vacuum signals fluctuate rapidly, they need to be combined through a vacuum manifold system to create a smooth and usable signal.

The Rennen Vacuum Fittings & Tube Set allows:

• Connection of each throttle body to the vacuum manifold
• Stable vacuum signal generation
• Accurate MAP sensor readings
• Improved ECU tuning capability
• Consistent engine load measurement
• Reliable idle control strategies
• Enhanced drivability

Without the correct vacuum plumbing, modern engine management systems can struggle to interpret engine load accurately.

Why Is a Vacuum Manifold Important on Barrel ITBs?

Barrel throttle bodies provide exceptional airflow and throttle response but naturally produce highly pulsed vacuum signals.

The Rennen by JSR Vacuum Manifold and associated fittings help:

• Smooth vacuum fluctuations
• Improve MAP sensor accuracy
• Enhance fuel delivery calculations
• Improve ignition mapping accuracy
• Stabilise idle operation
• Improve low-speed drivability
• Simplify ECU calibration

The result is a more refined and predictable engine that retains all the performance benefits of an Individual Throttle Body conversion.

Why Are Individual Throttle Body Upgrades So Popular?

Individual Throttle Body systems are widely regarded as one of the most desirable naturally aspirated performance upgrades available for Porsche engines.

Benefits include:

• Instant throttle response
• Improved airflow efficiency
• Enhanced engine breathing
• Increased performance potential
• Greater tuning flexibility
• Motorsport-inspired induction sound
• Improved driver engagement
• Stunning engine bay appearance

When combined with modern EFI systems and correctly configured vacuum management, ITBs deliver exceptional performance and drivability.

Why Choose the Rennen Vacuum Fittings & Tube Set?

This kit has been developed specifically to work with the Rennen by JSR Vacuum Manifold and Barrel ITB systems.

Benefits include:

• Correct fitment for Rennen systems
• Simplified installation
• Reliable vacuum connections
• Improved tuning accuracy
• Stable engine management signals
• Professional conversion finish
• Suitable for road and motorsport use
• Supports advanced ECU functionality