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Porsche > 993 (911) (1994-1998) > 993 (911) GT2 1994-97 > Engine Rebuild Parts > Air Intake & Injection >

Inlet Manifold

Inlet Manifold

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DISPLAYING 1 to 5 (of 5 products)
Air intake manifold 964/993 to GT3, billet aluminium with manifold gaskets. Porsche 964 / 993 - 96411071101, 99311071250
4
Air intake manifold 964/993 to GT3, billet aluminium with manifold gaskets. Porsche 964 / 993
96411071101
Product Information
Product Information
Air intake manifold 964/993 to GT3, billet aluminium - Set of 6
Comes complete with thermal insulating manifold gaskets

islandworks

Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

Tailored for GT3 Type Intakes:
Specially designed to fit GT3  intake manifolds (with built-in offsets) perfectly accommodating the narrower 964/993 engines.

Product Overview:
Crafted from top-quality aircraft aluminum, our Porsche 964/993 to GT3 Billet Intake Runners offer optimal performance. 
Available in head diameters of 41.5mm, 42.5mm, 44mm or 45.8mm with standard injector sizes. 

Versatile Compatibility and Configurations:
Compatible with standard rails or engineered for use with the IslandWorks/Nuke system, featuring a direct mount fuel regulator. 

Superior Craftsmanship and Finish:
Each runner boasts a natural machined finish and includes a base gasket insulator, ensuring optimal performance.

Important Note:
To ensure effective heat insulation, this product requires a flat cylinder head seal, offering better performance compared to the usual seal type.
Supplied with reinforced high thermal plastic gaskets for thermal insulation



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Related, superseded, cross reference or alternative numbers for comparison.

96411071101
96411071101
99311071250

The product you are viewing cross references to these numbers
Air intake manifold billet aluminium with manifold gaskets. Porsche 964 / 993 - 96411071101, 99311071250
7
Air intake manifold billet aluminium with manifold gaskets. Porsche 964 / 993
99311071250
Product Information
Product Information
Air intake manifold billet aluminium - Set of 6
Comes complete with manifold gaskets

islandworks

Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

For use with the standard 964/993 inlet manifolds and 3 bolt manifolds

Product Details:
Replace your aging plastic intake runners on the Porsche 964/993 with meticulously 3D milled billet versions in aircraft aluminum, offering durability and aesthetic enhancement.

Enhanced Specifications:
Available in head diameters of 41.5mm or 42.5mm, paired with standard injector sizes. 

Flexible Compatibility and Configurations:
Compatible with standard rails 

Important Note:
To ensure effective heat insulation, this product requires a flat cylinder head seal, offering better performance compared to the usual seal type.
Supplied with reinforced high thermal plastic gaskets for thermal insulation

Craftsmanship and Finish:
Featuring a natural machined finish, these runners are equipped with a base gasket insulator for 



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

99311071250
96411071101
99311071250

The product you are viewing cross references to these numbers
Drive by wire inlet conversion kit with manifolds. Porsche 964 / 993 - 96411090100, 96411090130, 99611061996
8
Drive by wire inlet conversion kit with manifolds. Porsche 964 / 993
96411090100
Product Information
Product Information
Drive by wire inlet conversion kit
Convert the 964/993 induction to Drive by Wire set-up


Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

Product Overview:
Transform your Porsche 964's performance with this sleek and high-tech intake kit designed for Porsche 964/993. This innovation marks a transition from the typical accelerator cable-based throttle to an electronic "drive by wire" throttle body. This advanced change streamlines the intake system by eliminating unnecessary components, resulting in a cleaner engine bay appearance. 

This modification offers a more drivable setup for highly tuned engines while incorporating the precision of a drive by wire (DBW) throttle.

This enhanced drivability is a key feature for a tuned aircooled engine and allows for smooth idle control with a cold as well as a hot engine. It simply makes the engine feel more modern as compared to the old ITB (individual throttle bodies) setups lacking in mid range torque and difficulties with the idle control.

Precision-Engineered Components:

  • 82mm Throttle Body with Reinforced Industrial PA12 Manifold
  • CNC-Milled Intake Manifold Stacks Crafted from Billet Aluminium
  • Included Rubber Boots and Clamps for Easy Installation
  • Islandworks Resonance Tube with Valve and Solenoid, Manufactured from the Same PA12 Material
  • Integrated Manifold Pressure and Temperature Sensors
  • Essential Vacuum Lines for Optimal Performance

Kit Includes
Complete intake with all the parts seen in the image manufactured from modified PA12 using an industrial process. This intake plenum has been optimized to fit on a Porsche 964 or Porsche 993 and includes all vacuum ports for both brake vacuum and to maneuver the resonance flap.

The following parts will be reused from the 964 intake:

  • Rubber boots and clamps
  • Vacuum reservoir
  • The aluminum or plastic plenums
  • Resonance flap
  • Actuator and shaft

Note: the aluminum or plastic intake plenum is not included in the kit and neither are any of the items specifically listed as excluded above.



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

96411090100
96411090100
96411090130
99611061996

The product you are viewing cross references to these numbers
Intake manifold rubber sleeve. Porsche 964 / 993 - 96411068703
2
Intake manifold rubber sleeve. Porsche 964 / 993
Special Order item
96411068703
Product Information
Product Information
Intake manifold rubber sleeve.

porsche

Fits:
Porsche 964 C2 / C4 / RS 1989-94
Porsche 993 Carrera 1994-98
Porsche 993 Turbo

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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

96411068703
96411068703

The product you are viewing cross references to these numbers
Intake manifold rubber sleeve. Porsche 964 / 993 - 96411068703
2
Intake manifold rubber sleeve. Porsche 964 / 993
96411068703/8
Product Information
Product Information
Intake manifold rubber sleeve.

Fits:
Porsche 964 C2 / C4 / RS 1989-94
Porsche 993 Carrera 1994-98
Porsche 993 Turbo

Diagram ref no 7

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

96411068703
96411068703

The product you are viewing cross references to these numbers
DISPLAYING 1 to 5 (of 5 products)
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About Inlet Manifold

Air Inlet Manifolds – Precision Airflow Distribution for Porsche Engines

Air inlet manifolds, often referred to as intake manifolds, are vital components in Porsche engines that ensure even air distribution to each cylinder. By controlling the air supply entering the combustion chambers, these manifolds optimise engine breathing, improving fuel efficiency, throttle response, and overall performance.

At Design911, we supply a wide range of genuine and high-quality air inlet manifolds for numerous Porsche models, including  911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each unit is crafted from high-strength materials to deliver consistent airflow, exceptional durability, and precise fitment — maintaining your Porsche’s power and refinement.

What Do Air Inlet Manifolds Do?

The air inlet manifold is a critical part of the intake system that manages and distributes air from the throttle body into the engine’s cylinders. Its functions include:

  • Delivering uniform airflow to each cylinder for efficient combustion.
  • Optimising torque and power output across all engine speeds.
  • Balancing air pressure for smoother idling and acceleration.
  • Enhancing engine cooling and fuel economy through consistent airflow management.

In performance-oriented Porsche engines, the air inlet manifold is carefully tuned to maximise airflow dynamics — contributing directly to the car’s responsiveness and driving feel.

Why Do Air Inlet Manifolds Fail?

Air inlet manifolds operate under constant pressure, heat, and vibration, which can lead to deterioration over time. Common causes of failure include:

  • Cracks or leaks in plastic or aluminium housings due to heat cycling.
  • Carbon buildup restricting airflow through the manifold runners.
  • Faulty gaskets or seals allowing unmetered air to enter the system.
  • Vacuum leaks affecting idle stability and performance.
  • Mechanical damage caused by backfires or overpressure.

Symptoms of a failing air inlet manifold may include rough idling, loss of power, engine misfires, increased fuel consumption, or a check engine light related to air intake irregularities.

Why Replace a Damaged Air Inlet Manifold?

A cracked or leaking air manifold can cause air imbalance, poor combustion, and reduced engine efficiency. Replacing the component restores smooth airflow, optimises fuel economy, and protects engine health.

Benefits of replacement include:

  • Restored airflow and balanced combustion.
  • Improved throttle response and power delivery.
  • Reduced emissions and improved fuel efficiency.
  • Long-term reliability with manufacturer-quality precision.

All air inlet manifolds available at Design911 are made with high-quality materials, precision-engineered sealing surfaces, and optimised airflow geometry — ensuring lasting durability and peak performance in both standard and high-performance Porsche engines.

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