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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
The Adapt Motorsport 996 GT3 intake manifold adapter kit connects a GT3 manifold to compatible air-cooled Porsche 964 and 993 engines. Its compact, CNC-machined aluminium adapters are tapered to match the selected cylinder-head port with the manifold’s 49mm bore and comes with fuel rails.
Fits:
- Porsche 964 (911) 1989–1994
- Porsche 964 (911) C2 1989–93
- Porsche 964 (911) C4 1989–93
- Porsche 993 (911) 1994–1998
- Porsche 993 (911) C2 1994–97
- Porsche 993 (911) C4 1994–97
- Porsche 993 (911) C2S 1994–97
- Porsche 993 (911) C4S 1994–97
What This Product Does
The kit provides the physical transition required to install 996 GT3 intake manifolds on compatible three-bolt air-cooled cylinder heads. Its short design limits the total height of the intake assembly, helping to reduce potential interference around the idle-air control components, intake boot and engine-bay insulation.
The injector is positioned over the original relief in the intake port. The adapters also provide mounting provisions for Adapt Motorsport fuel rails when the appropriate fuel-rail configuration is selected.
Functions
- Connects a 996 GT3 intake manifold to compatible Porsche 964 and 993 cylinder heads
- Transitions the selected intake-port diameter to the manifold’s 49mm bore
- Maintains a compact intake-system height
- Positions the injector above the original intake-port relief
- Supports Bosch fuel injectors with 14mm O-ring fittings
- Provides mounting points for compatible Adapt Motorsport fuel rails
Technical Details
- Precision CNC-machined from high-grade aluminium
- Black anodised finish
- Standard adapter height: 78mm
- Tall adapter height: 113mm, adding 35mm of runner length
- 42mm adapters are specified for standard 964 ports measuring approximately 41.5mm
- 44mm adapters are specified for standard 993 ports measuring approximately 43.5mm;
Injector Compatibility
The supplied fuel-rail spacer posts accommodate long-body Bosch EV1, EV6 and EV14 injectors. Markings on the posts allow them to be shortened for compatible medium- or short-length injectors. All injectors must use 14mm O-ring fittings.
Kit Contents
- Six CNC-machined aluminium intake adapters
- Four fuel-rail spacer posts
- Four bolts for standard full-length Bosch injectors
- Fuel rails and fittings when a fuel-rail kit configuration is selected
GT3 intake manifolds, rubber joiners, fuel injectors and hose clamps are not included. An advanced single fuel-rail option with an integrated pressure regulator and damper is available only with compatible adapter and fuel-rail kit configurations.
Power-Steering Compatibility
Versions identified as “No PS” are intended for installations without a hydraulic power-steering pump, including suitable G-model conversions or vehicles using electric power steering. No PS adapters will not fit a Porsche 964 or 993 while its hydraulic power-steering pump remains installed.
Why Correct Selection Matters
The adapter diameter should correspond with the measured cylinder-head port. Correct selection provides the intended transition into the head, while the appropriate height, injector arrangement and power-steering clearance allow the converted intake assembly to be installed as designed.
FAQs
- Which size is used with a standard 964 port? The manufacturer specifies the 42mm adapter for a standard 41.5mm 964 intake port.
- Which size is used with a standard 993 port? The 44mm adapter is specified for the standard 43.5mm 993 intake port.
- When should the 46mm option be considered? It is offered for applicable RS or non-standard enlarged ports. Measure the cylinder-head ports before selection.
- Can different injector lengths be installed? Yes. The marked posts may be shortened for compatible long, medium or short Bosch injectors.
- Are the GT3 manifolds included? No. Manifolds, rubber joiners, injectors and hose clamps must be obtained separately.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
AMS9050094
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