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Porsche 964 (911) (1989-1994) Engine Rebuild Parts Air Intake & Injection

Throttle Body / Plenum Chamber

Throttle Body / Plenum Chamber

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DISPLAYING 17 to 24 (of 24 products)
1 2
Fuel injection throttle body kit with plenum adapters. Porsche 964 - TBK.PO.964.42.P, TBK.PO.964.48.P
2
Fuel injection throttle body kit with plenum adapters. Porsche 964
TBK.PO.964.
Product Information
Product Information
Fuel injection throttle body kit with plenum adapters - Without fuel injectors



Fits:
Porsche 964 Carrera 2 / Carrera 4 - 1989 to 1994

This is a direct replacement kit for converting your Porsche 964 engine to ITBs using plenum adapers (for a plenum chamber)

Kit includes:
6 x Full billet, hard anodised ITB with a stainless steel lever assembly
6 x Thermo barrier gaskets
2 x Fuel rail with mounting hardware
1 x Throttle actuator hard anodised with 2 throttle connection rods manufactured out of stainless steel
1 x Throttle position sensor with mounting hardware
All the needed mounting hardware and fittings.  

ITBs in 2 different sizes:
- Tapered ITB: ∅42mm-∅41,5mm (∅42mm is the butterfly valve size, ∅41,5mm is the intake port diameter)
- Tapered ITB: ∅48mm-∅41,5mm (∅48mm is the butterfly valve size, ∅41,5mm is the intake port diameter) 

All parts of this kit are made out of a single piece 6082 aluminum and are anodized or hard anodized to make them more wear resistant. 

The mounting hardware and other parts are made out of stainless steel, the fuel rails out of 6060 aluminum extrusion profile and come with AN6 ORB connection for the fuel lines. 

The throttle linkages and all mounting hardware are made out of stainless steel and the pivoting points of the throttle linkage are made with ball and socket design for smooth operation. The throttle actuator has a bearing inside for a long lifespan. 

You are also able to use the OEM throttle connection cable but you will need to cut the rigid part at the end of the cable and mount a cable nipple for connecting the cable to the throttle actuator. All aluminum parts of the throttle actuator assembly are manufactured out of 6082 aluminum and are hard anodized.

The levers allow you to adjust and finetune mechanical movement of the ITBs

Fuel injectors, fuel lines, standalone ECU, wire harness are NOT included in the kit but work together 

Fuel injection throttle body kit. Porsche 964 - TBK.PO.964.42, TBK.PO.964.48
2
Fuel injection throttle body kit. Porsche 964
TBK.PO.964.
Product Information
Product Information
Fuel injection throttle body kit - Without fuel injectors



Fits:
Porsche 964 Carrera 2 / Carrera 4 - 1989 to 1994

This is a direct replacement kit for converting your Porsche 964 engine to ITBs 

Kit includes:
6 x Full billet, hard anodised ITB with a stainless steel lever assembly
6 x Thermo barrier gaskets
2 x Fuel rail with mounting hardware
1 x Throttle actuator hard anodised with 2 throttle connection rods manufactured out of stainless steel
1 x Throttle position sensor with mounting hardware
All the needed mounting hardware and fittings.  

ITBs in 2 different sizes:
- Tapered ITB: ∅42mm-∅41,5mm (∅42mm is the butterfly valve size, ∅41,5mm is the intake port diameter)
- Tapered ITB: ∅48mm-∅41,5mm (∅48mm is the butterfly valve size, ∅41,5mm is the intake port diameter) 

All parts of this kit are made out of a single piece 6082 aluminum and are anodized or hard anodized to make them more wear resistant. 

The mounting hardware and other parts are made out of stainless steel, the fuel rails out of 6060 aluminum extrusion profile and come with AN6 ORB connection for the fuel lines. 

The throttle linkages and all mounting hardware are made out of stainless steel and the pivoting points of the throttle linkage are made with ball and socket design for smooth operation. The throttle actuator has a bearing inside for a long lifespan. 

You are also able to use the OEM throttle connection cable but you will need to cut the rigid part at the end of the cable and mount a cable nipple for connecting the cable to the throttle actuator. All aluminum parts of the throttle actuator assembly are manufactured out of 6082 aluminum and are hard anodized.

The levers allow you to adjust and finetune mechanical movement of the ITBs

Fuel injectors, fuel lines, standalone ECU, wire harness are NOT included in the kit but work together 

Intake manifold set GT3 style. Porsche 964 / 993 / 996 - 99611061996 - SL-IP-01-CF, SL-IP-01-PA
8
Intake manifold set GT3 style. Porsche 964 / 993 / 996
99611061996
Product Information
Product Information
Intake manifold set GT3 style. 
Sold as a pair



Fits:
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 996 - 1997 to 2005

Introducing the Silverlake Porsche 911 GT3-style intake manifolds, designed for both ITB (Individual Throttle Bodies) or DBW (Drive-By-Wire) applications. These manifolds are compatible with air-cooled and water-cooled Porsche engines, offering a lightweight and high-performance alternative to the OEM cast aluminum version.

Available in two advanced materials: temperature-cured carbon fiber prepreg or glass fiber-reinforced thermoplastic, each plenum weighs just 825 grams (1.8 lbs), significantly lighter than the 2400 grams (5.3 lbs) of the stock aluminum version. This results in a total weight reduction of 3.15 kg (7 lbs) per pair — a 65% savings compared to the original.

Engineered and flow bench tested to ensure optimal airflow volume, the carbon fiber version features a matte finish, while the thermoplastic model comes painted in black, with the option for custom repainting. Both versions are free of logos, providing a clean, personalized look.

The kit includes two manifolds/plenums, the high-temperature silicone couplers are available separately.

This product replaces Porsche part 99611061996



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

99611061996
99611061996

The product you are viewing cross references to these numbers
Intake system for individual throttle bodies carbon fibre. Porsche 964 / 993
6
Intake system for individual throttle bodies carbon fibre. Porsche 964 / 993
SL-ITB-CF
Product Information
Product Information
Intake system for individual throttle bodies carbon fibre. 



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

Silverlake Projects presents a complete intake system for air-cooled Porsche 964/993 engines equipped with ITBs (Individual Throttle Bodies), designed for maximum performance and efficiency.

The intake system includes:

  • 2 x GT3-style intake manifolds in carbon fiber
  • Glass-reinforced thermoplastic intake T-tube for air filter connection
  • Resonance flap or resonance flap delete tube in glass-reinforced thermoplastic, complete with vacuum actuator
  • 6 x high-temperature silicone couplers for manifold-to-runner connections
  • 4 x high-temperature silicone couplers for manifold-to-T/resonance flap connections
  • TMAP sensor for accurate manifold pressure readings
  • All mounting fasteners in lightweight titanium alloy
  • Vacuum reservoir for optimal pressure management

Weighing just 4.5 kg (9.9 lbs), this system is significantly lighter than the stock 964 intake, which weighs 11.5 kg (25.3 lbs).

Why choose our system?

  • 50% lighter than stock: A combination of carbon fiber, thermoplastics, and titanium results in a remarkably light system.
  • Fuel rail precision mounting: Direct mounting to the runner ensures perfect injector press fit.
  • Superior heat insulation: CNC-machined PTFE inserts between the cylinder head and runner offer exceptional heat protection, especially in idle or street driving conditions.
  • Perfect sealing: Custom nitrile O-rings between the runner and cylinder head, as well as the intake T and throttle body, guarantee a secure, leak-free fit.
  • Premium silicone sleeves: Silverlake’s precision-molded OEM+ silicone sleeves provide superior temperature resistance and ensure a flawless fit with all components, delivering better airflow and an unmatched look.
  • Titanium fasteners: Tin-coated titanium alloy hardware not only reduces weight but also enhances the system’s aesthetic appeal.

This intake system is built for those seeking the ultimate performance, weight savings, and durability for their Porsche 964/993 engine.

Intake system for individual throttle bodies glass reinforced thermoplastic. Porsche 964 / 993
6
Intake system for individual throttle bodies glass reinforced thermoplastic. Porsche 964 / 993
SL-ITB-GRP
Product Information
Product Information
Intake system for individual throttle bodies glass reinforced thermoplastic. 



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

Silverlake Projects presents a complete intake system for air-cooled Porsche 964/993 engines equipped with ITBs (Individual Throttle Bodies), designed for maximum performance and efficiency.

The intake system includes:

  • 2 x GT3-style intake manifolds in glass-reinforced thermoplastic
  • Glass-reinforced thermoplastic intake T-tube for air filter connection
  • Resonance flap or resonance flap delete tube in glass-reinforced thermoplastic, complete with vacuum actuator
  • 6 x high-temperature silicone couplers for manifold-to-runner connections
  • 4 x high-temperature silicone couplers for manifold-to-T/resonance flap connections
  • TMAP sensor for accurate manifold pressure readings
  • All mounting fasteners in lightweight titanium alloy
  • Vacuum reservoir for optimal pressure management

Weighing just 4.5 kg (9.9 lbs), this system is significantly lighter than the stock 964 intake, which weighs 11.5 kg (25.3 lbs).

Why choose our system?

  • 50% lighter than stock: A combination of carbon fiber, thermoplastics, and titanium results in a remarkably light system.
  • Fuel rail precision mounting: Direct mounting to the runner ensures perfect injector press fit.
  • Superior heat insulation: CNC-machined PTFE inserts between the cylinder head and runner offer exceptional heat protection, especially in idle or street driving conditions.
  • Perfect sealing: Custom nitrile O-rings between the runner and cylinder head, as well as the intake T and throttle body, guarantee a secure, leak-free fit.
  • Premium silicone sleeves: Silverlake’s precision-molded OEM+ silicone sleeves provide superior temperature resistance and ensure a flawless fit with all components, delivering better airflow and an unmatched look.
  • Titanium fasteners: Tin-coated titanium alloy hardware not only reduces weight but also enhances the system’s aesthetic appeal.

This intake system is built for those seeking the ultimate performance, weight savings, and durability for their Porsche 964/993 engine.

Microswitch for Throttle Body Flap. Porsche 964 89-94 - 91160601903
2
Microswitch for Throttle Body Flap. Porsche 964 89-94
Special Order item
91160601903
Product Information
Product Information
Microswitch for Throttle Body Flap.



Fits
Porsche 964 C2 / C4 1989-94

Click 'Zoom in' for large parts diagram.
Diagram ref no 21.

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

91160601903
91160601903

The product you are viewing cross references to these numbers
Throttle Body Flap Tension Spring. Porsche 911 / 964 - 93011049700
2
Throttle Body Flap Tension Spring. Porsche 911 / 964
Special Order item
93011049700
Product Information
Product Information
Throttle Body Flap Tension Spring.



Fits
Porsche 911 1972-89
Porsche 911 (930) Turbo 1975-89
Porsche 964 Turbo 3.3L / 3.6L 1991-94

Click 'Zoom in' for large parts diagram.
Diagram ref no 10.

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

93011049700
93011049700

The product you are viewing cross references to these numbers
Throttle Housing Linkage Rod for Porsche 964 Carrera 1989-1994 - 96411064901
3
Throttle Housing Linkage Rod for Porsche 964 Carrera 1989-1994
Special Order item
96411064901
Product Information
Product Information
Throttle housing linkage rod. 

Fits:
Models With Automatic Speed Control (PR 454)
Porsche 964 Carrera 1989-94

Diagram ref. 39.

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

96411064901
96411064901

The product you are viewing cross references to these numbers
DISPLAYING 17 to 24 (of 24 products)
1 2
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About Throttle Body / Plenum Chamber

Throttle Bodies & Plenum Chambers – Engine Breathing Precision for Porsche Performance

Throttle bodies and plenum chambers are critical components of your Porsche’s air intake system. Together, they regulate and distribute airflow entering the engine, directly influencing throttle response, torque, and overall driving performance. The throttle body controls how much air enters the intake manifold, while the plenum chamber ensures balanced air delivery to all cylinders — maintaining consistent power and efficiency across the rev range.

At Design911, we supply a complete range of genuine and high-quality throttle bodies and plenum chambers for Porsche models like 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each unit is precision-engineered for smooth airflow, accurate response, and long-term reliability, keeping your Porsche performing at its best.

What Do Throttle Bodies & Plenum Chambers Do?

These components are essential for efficient engine breathing and performance tuning. Their key functions include:

  • Controlling airflow entering the engine for precise throttle response.
  • Optimising air distribution to each cylinder for smooth, balanced power.
  • Improving combustion efficiency and engine performance.
  • Supporting enhanced torque and acceleration in naturally aspirated and turbocharged engines.

In performance models, upgraded throttle bodies and plenum chambers can increase air volume and flow efficiency — unlocking additional horsepower and sharper throttle control.

Why Do Throttle Bodies & Plenum Chambers Fail?

Over time, these components can experience wear, contamination, or mechanical issues due to harsh operating conditions. Common causes of failure include:

  • Carbon buildup or dirt affecting airflow and throttle operation.
  • Electronic faults in the throttle actuator or position sensor.
  • Air leaks from worn seals or cracked housings.
  • Heat damage or corrosion in the plenum chamber.
  • Mechanical sticking of the throttle plate or linkage.

Symptoms of failure include rough idle, reduced acceleration, check engine light warnings, poor throttle response, or inconsistent idle speed.

Why Replace Faulty Throttle Bodies or Plenum Chambers?

A damaged or restricted throttle body or plenum chamber can significantly reduce engine performance and responsiveness. Replacing these components restores precise airflow control, smooth throttle transitions, and optimal fuel efficiency.

Benefits of replacement include:

  • Restored engine power and responsiveness.
  • Improved air distribution and combustion efficiency.
  • Smoother idling and better fuel economy.
  • Long-term reliability with manufacturer-quality precision.

All throttle bodies and plenum chambers available from Design911 are built using advanced materials, high-precision machining, and corrosion-resistant finishes — ensuring dependable performance and durability in every Porsche application.

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