Performance Plenum

This Adapt Motorsport inlet manifold adapter kit with fuel rails enables Porsche engines with two-bolt cylinder heads to accept 996 GT3 intake manifolds during an EFI conversion. It is offered with 40mm or 42mm ports in an anodised black finish.

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

The six adapters provide the interface required between the earlier two-bolt cylinder heads and a 996 GT3 intake manifold. Each adapter is machined to the selected cylinder-head port diameter and tapers towards the manifold's 48mm bore.

The compact adapter height helps retain a low overall intake assembly, reducing potential interference between the idle-air control components, intake boot and engine-bay insulation. Injector positioning corresponds with the original CIS injector relief in the intake port, directing the fuel spray into the port when used with a compatible EFI installation.

Kit Contents

• Six CNC-machined aluminium manifold adapters
• Four fuel-rail spacer posts
• Four bolts for standard full-length Bosch injectors
• Twelve nuts and washers for the cylinder-head studs
• Two fuel rails  

Functions

• Adapts two-bolt Porsche 911 cylinder heads to 996 GT3 intake manifolds
• Supports EFI conversion of compatible 2.7L, 3.0L and 3.2L engines
• Provides mounting provisions for Adapt Motorsport fuel rails
• Positions the injectors above the original CIS injector-port relief
• Accommodates Bosch-type injectors with 14mm O-ring fittings
• Maintains a compact intake assembly height

Technical Details

• Available port diameters: 40mm or 42mm
• Manifold-side bore: tapered to suit the 48mm 996 GT3 manifold bore
• Material: precision CNC-machined high-grade aluminium
• Finish: black anodised
• Injector compatibility: Bosch 14mm O-ring fuel injectors
• Marked fuel-rail spacers can be shortened for long, medium or short injector formats

Configurations are available as an adapter kit alone or with a fuel rail kit. For the adapter-only configuration, fuel rails are not supplied.

Parts Not Included

• 996 GT3 intake manifolds
• Rubber manifold joiners
• Fuel injectors
• Hose clamps

Why Replacement Matters

This kit is intended for planned EFI and intake-manifold conversions rather than replacement of a standard component. Correct port selection, injector sizing, fuel-system specification and engine-management calibration are required for a complete installation.

FAQs

• Does the kit fit both available port sizes?
  Select either the 40mm or 42mm version to match the cylinder-head intake ports.
• Are fuel injectors supplied?
  No. The adapters accept Bosch 14mm O-ring injectors, but the injectors must be selected separately.
• Is the 996 GT3 manifold included?
  No. The intake manifolds, rubber joiners and associated hose clamps are not part of the adapter kit.
• Can different injector lengths be used?
  The marked fuel-rail spacers can be cut to accommodate long, medium or short injector formats as required by the installation.

Fits:
Porsche 911 - 1974 - 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

911 used 2-Bolt type
964/993 uses 3-Bolt type

Please Note: 
The aluminium or plastic intake plenum (inlet manifold) is not included in the kit

Product Overview:

Inject power and precision into your vintage aircooled engine, now also for turbo or supercharged cars.

To be used when converting a G-Model 911 or a 964/993 engine to a turbocharged/supercharged engine with a 964 induction based Drive by Wire set-up

Conversion kit to a Porsche 964 based intake system to become a DBW (Drive by wire) intake based 74mm original Bosch throttle body (Sometimes referred to as 76mm) specifically executed all in CNC milled billet aluminum.

This is sold either with the intention to convert a Porsche 964/993 engine or to adapt and convert a 964 intake onto a G-model car when turbocharging.

Kit includes:

• Throttle body runner for 74mm throttle body in aluminum 
• Vacuum port on throttle body runner
• Original Bosch electronic throttle body
• Original Bosch MAP-T-sensor
• Connecting pipe out of aluminum replacing the resonance tube

Intake runners for the Porsche 911 G-model (2-bolt) or 964/993 (3-bolt) engine are made out of billet aluminium, 3D milled in a 5-axis machine. The port diameter indicated in the options is the diameter of the port in the cylinder head. 

The following parts are to be reused from your original 964 intake:
Rubber boots and clamps
The plenums (inlet manifolds)

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

Fits:
Porsche 911 - 1974 to 1989

Please Note: 
The aluminium or plastic intake plenum (inlet manifold) is not included in the kit

Product Overview:

Inject power and precision into your vintage aircooled engine

Conversion kit for the 911 G-model to become a DBW (Drive by wire) intake based on the 964 induction and using the 74mm original Bosch throttle body (Sometimes referred to as 76mm). This is intended to breathe a bit more life into a classic G-model.

The kit includes

• Throttle body runner for 74mm throttle body
• Original Bosch electronic throttle body
• Original Bosch MAP-T-sensor
• Resonance tube
• Vacuum solenoid
• Connectors and hose
• Vacuum check valve
• Intake runners for the Porsche 911 G-model engine

Intake runners are made out of billet aluminium, 3D milled in a 5-axis machine. The port diameter indicated in the options is the diameter of the port in the cylinder head. Please note that these are the 2-bolt designs. 

To create a bit of intimacy between you and your engine we have included a bit of DIY work for you to convert the Porsche 964 intake into this version. 
This kit does not come with 964 intake manifolds so you will need so source a pair separately.

The intake also exists in two versions (billet aluminium or PA12 plastic) - This is the premium version where the throttle body runner is milled out of a billet in aluminum. This is the pinnacle of craftmanship giving a very solid feel to the intake at a natural premium. Both options have the same performance and the same durability with the difference being the look and feel of a 5-axis machined piece as the very first thing you lay your eyes on when you open the engine decklid!

For both options the lower resonance tube is made from our usual modified PA12 in black.

The following parts will be reused from the 964 intake:

• Rubber boots and clamps
• Vacuum reservoir
• The aluminium or plastic plenums
• Resonance flap, actuator and shaft

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

Fits:
Porsche 911 - 1974 - 1989

Please Note: 
The aluminium or plastic intake plenum (inlet manifold) is not included in the kit.

Product Overview:

Inject power and precision into your vintage aircooled engine

Conversion kit for the 911 G-model to become a DBW (Drive by wire) intake based on the 964 induction and using the 74mm original Bosch throttle body (Sometimes referred to as 76mm). This is intended to breathe a bit more life into a classic G-model.

The kit includes

• Throttle body runner for 74mm throttle body
• Original Bosch electronic throttle body
• Original Bosch MAP-T-sensor
• Resonance tube
• Vacuum solenoid
• Connectors and hose
• Vacuum check valve
• Intake runners for the Porsche 911 G-model engine

Intake runners are made out of billet aluminium, 3D milled in a 5-axis machine. The port diameter indicated in the options is the diameter of the port in the cylinder head. Please note that these are the 2-bolt designs. 

To create a bit of intimacy between you and your engine we have included a bit of DIY work for you to convert the Porsche 964 intake into this version.  This kit does not come with 964 intake manifolds so you will need so source a pair  separately.

The intake also exists in two versions (billet aluminium or PA12 plastic) - this version is what we at Islandworks use with all other intakes, being a modified PA12 material from an industrial manufacturing process. Both options have the same performance and the same durability with the difference being the look and feel of a 5-axis machined piece as the very first thing you lay your eyes on when you open the engine decklid.
For both options the lower resonance tube is made from our usual modified PA12 in black.

The following parts will be reused from the 964 intake:

• Rubber boots and clamps
• Vacuum reservoir
• The aluminium or plastic plenums
• Resonance flap, actuator and shaft

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

Adapt Motorsport GT3 intake manifolds for air-cooled Porsche 911 engines using the brand's intake conversion system. Supplied as a pair, they combine cast-aluminium construction with geometry developed specifically for the shorter spacing of air-cooled engines.

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 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• 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
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) TURBO S 1994-97

What This Product Does

These manifolds adapt the Porsche GT3 intake manifold concept for air-cooled 911 engine architecture. Their interfaces accommodate the shorter engine spacing, while computational fluid dynamics modelling was used during development to refine the internal airflow geometry.

Functions

• Provides GT3-style intake manifolds for compatible air-cooled engine conversions
• Interfaces with Adapt Motorsport DBW intake adapters and throttle kits
• Provides vacuum connections for the brake booster and idle-air bypass
• Supports additional vacuum-source requirements within a custom installation
• Uses discreet tabs to secure wiring and vacuum-control components

Technical Details

• Supplied as a pair of intake manifolds
• Cast-aluminium construction
• Designed for the shorter intake spacing of air-cooled Porsche 911 engines
• Factory-style external lugs are omitted for a cleaner installation
• Additional integrated vacuum ports
• Matching adapter sleeves are optional components for connection to the intake adapters, throttle body and resonance flap
  
  

FAQs

• Is this a complete intake system? This product consists of a pair of intake manifolds. Matching adapter sleeves and other intake-system components are separate elements.
• What material are the manifolds made from? They are manufactured from cast aluminium for a factory-style appearance.
• Are vacuum connections included? Yes. The manifolds incorporate ports for brake-booster vacuum, idle-air bypass and other vacuum-source requirements.
• Can they be used with electronic throttles? They are designed to integrate with Adapt Motorsport DBW intake adapters and throttle kits.

Check fitment for your specific vehicle, engine specification and intake conversion before ordering.

Fits:
Porsche 911 / 911S 2.7ltr - 1974 to 1977
Porsche 911 SC - 1978 to 1983
Porsche 911 3.2 Carrera - 1984 to 1989

These adapters are used to modify the 2.7ltr / 3.0ltr / 3.2ltr Porsche 911 2 bolt cylinder head engines to the later 964 / 993 3.6ltr intake manifolds when converting to EFI.  

CNC machined on a 5 axis machine to our exacting tolerances and finish and anodised dark grey these are custom machined to match your port diameter and tapered to fit up to the 42mm inlet manifold port size.

The short adapor height maintains the overall height of the intake set, reducing the interference between the idle air control, the intake boot and the top of the engine bay insulation.  The factory plastic 3 bolt 964 stacks are too tall, and adding an adapter spacer would make the manifolds not fit at all.

This design permits the use of the standard 964 fuel injectors and fuel rails so positions the injector over the same relief in the intake port for the original CIS injector, ensuring proper atomisation of the injector spray into the intake port.

Key Features:
Precision machined from high grade aluminium
Anodized finish
Fits all Bosch 14mm O-ring fuel injectors
Fuel rail spacers are marked for easy cutting to suit long, medium or short injector types.

Kit Includes:
6 x CNC aluminium adapters
4 x Spacer/Posts for fuel rail 
4 x Bolts to suit standard full length Bosch injectors
12 x Nuts and washers 

Fuel rails not included in kit

Check out our fuel rail and fuel pressure regulator kits to make the perfect conversion set

6 x manifold adaptors (no fuel rail)

Fits:
Porsche 911 / 911S 2.7ltr - 1974 to 1977
Porsche 911 SC - 1978 to 1983
Porsche 911 3.2 Carrera - 1984 to 1989

These adapters are used to adapt the 2.7ltr / 3.0ltr and 3.2ltr Porsche 911 2-bolt cylinder head engines to take the 996 GT3 intake manifolds when converting to EFI.  
CNC machined our exacting tolerances and finish and anodised dark grey these are custom machined to match your port diameter and tapered to fit the 49mm bore of the GT3 inlet manifold.

The short height maintains the overall height of the intake set, reducing the interference between the idle air control valve, the intake boot and the top of the engine bay insulation.  

This design permits the use of the AMS fuel rails, and positions the injector over the same relief in the intake port for the original CIS injector, ensuring proper atomisation of the injector spray into the intake port.

Key Features:
Precision machined from high grade aluminium
Anodized finish
Fits all Bosch 14mm O-ring fuel injectors
Fuel rail spacers are marked for easy cutting to suit long, medium or short injector types.

Kit includes:

• CNC aluminium adapters x 6
• Spacer/Posts for fuel rail x 4
• Bolts to suit standard full length Bosch injectors x 4
• Nuts and washers for cylinder head studs x 12

44mm adaptors are made to order. Please allow 4-5 weeks for delivery

Check out our fuel rail and fuel pressure regulator kits to make the perfect conversion set.

Adapt Motorsport intake manifold adapter kit with fuel rails for Porsche 911 2.7L, 3.0L and 3.2L engines with two-bolt cylinder heads. It enables later Porsche 964 or 993 3.6 intake manifolds to be installed as part of an electronic fuel injection conversion.

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

Kit Contents

• 6 CNC-machined aluminium intake adapters
• 4 fuel-rail spacer posts
• 4 bolts for standard full-length Bosch injectors
• 12 nuts and washers
• 2 Fuel rails

What This Product Does

The six adapters provide the interface between an earlier two-bolt Porsche 911 cylinder head and a later 964 or 993 3.6 intake manifold. Each adapter is machined to suit the selected cylinder-head port diameter and transitions to the manifold's 42mm bore.

A compact overall height helps retain clearance around the throttle body, idle air control valve and the upper area of the engine bay. The injector position is aligned above the existing CIS injector relief in the intake port. 

Functions

• Connects a 964 or 993 3.6 intake manifold to an earlier two-bolt cylinder head
• Supports conversion from CIS or an earlier injection arrangement to EFI
• Positions the injector over the original CIS injector-port relief
• Provides a tapered transition to the 42mm intake-manifold bore
• Maintains a short installed height for engine-bay clearance
• Accommodates Bosch injectors with 14mm O-ring fittings

Technical Details

• Five-axis CNC-machined high-grade aluminium construction
• Protective anodised finish
• Designed for Porsche 911 2.7L, 3.0L and 3.2L two-bolt cylinder heads
• Fuel-rail spacers are marked for adjustment to long, medium or short Bosch injector formats
• Manifold-side transition is designed for a 42mm bore

Components Not Included

Intake manifolds, rubber joining sleeves, fuel injectors and hose clamps are not supplied with the base adapter kit.

Installation Notes

This component forms part of a custom EFI installation rather than a complete conversion package. Confirm the cylinder-head port diameter, injector length, manifold specification and clearance around the throttle and idle-control components before assembly. Engine-management hardware, fuel delivery components and calibration must be selected for the completed installation.

Adapt Motorsport resonance flap vacuum actuator kit for air-cooled Porsche 911 engines using 964, 993 or 996 GT3 intake manifolds. It provides the vacuum control components in a compact assembly supported by an automotive-grade nylon bracket.

Fits:

• 911 1974–1977 2.7L / 1976–77 3.0 Carrera
• 911 1978–1983 3.0L / SC
• 911 1984–1986 3.2L
• 911 1987–1989 3.2L G50
• 911 1975–1977 3.0L Turbo (930)
• 911 1978–1989 3.3L Turbo (930)
• 964 (911) C2 1989–93
• 964 (911) C4 1989–93
• 993 (911) C2 1994–97
• 993 (911) C4 1994–97
• 993 (911) C2S 1994–97
• 993 (911) C4S 1994–97

What This Product Does

This kit supplies the vacuum equipment required to operate the intake manifold resonance flap on a classic air-cooled engine conversion. Its components are arranged together on a nylon support bracket to simplify installation and vacuum-line routing.

Functions

• Provides vacuum actuation for the intake manifold resonance flap
• Maintains vacuum through the supplied reservoir and check valve
• Uses a solenoid actuator to control the vacuum circuit
• Connects the system through the supplied hose, T-piece and tubing

Technical Details

• Suitable for classic air-cooled engines using 964 or 993 intake manifolds
• Also designed for conversions using a 996 GT3 intake manifold
• Includes a vacuum canister, check valve and solenoid vacuum actuator
• Supplied with a solenoid connector kit, T-piece, vacuum hose and interconnecting tubing
• Automotive-grade nylon support bracket and installation fasteners included
• Mounts directly to the Adapt Motorsport 964 drive-by-wire throttle conversion kit; installation with the GT3 kit requires a separate bracket made by the installer

Check fitment for your specific vehicle, engine, intake manifold and throttle conversion before ordering.