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Adapter Kit with Fuel Rails for Upgrade to 996 GT3 Manifolds, 40mm / 42mm Black. Porsche 911 1974-89 ❭ AMS905008
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- 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
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
What This Product Does
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.
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed