Inlet Manifold

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

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.

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.

Silicone coupler sleeve set for GT3 intake manifold plenum to throttle body. 
Sold as a set of 4

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes four silicone sleeves 

Replaces Porsche part number 99611068552 and 99611068650

Click 'Zoom in' for large parts diagram.
Diagram ref no 9 and 11

Silicone sleeve set for GT3 intake manifold. Porsche 964 / 993 / 996
Sold as a set of 6

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes six (6) silicone sleeves 

Replaces Porsche part numbers 99611068792 and 99611068790