Holden VN 308 304 EFI Air Gap Dual Plane Intake Manifold Black

Holden VN 308 304 EFI Air Gap Dual Plane Intake Manifold — Black Finish

Maximize carburetted engine performance with this Air Gap dual-plane intake manifold designed for Holden VN EFI-era V8s. The black finish delivers a rugged, factory-like appearance while promoting consistent air-fuel flow for enhanced power and throttle response from idle through mid-range to high RPM.

Key features

• Air Gap dual-plane design to promote steady air-fuel distribution and improved torque across the RPM range.
• Square bore carburettor pad compatible with aftermarket square-bore carburettors, supporting both manual and electric choke options.
• Non-EGR configuration to keep the intake path clean and efficient.
• Specifically designed for Holden 304 V8 engines and late-model VN EFI engines; will not fit late VT engines with factory roller camshaft.

Technical specifications

• Overall height (carb pad to bottom of manifold): 150 mm (check bonnet clearance).
• Port size: 1.20" x 2.05"
• Intake gasket: 5REGIM-308VN
• Carburettor studs: 4 x 5/16-18"
• Throttle bracket mounting hole: 1 x 5/16-18"
• NPT ports: 2 x 3/8" NPT (includes 1 steel port plug); 3 x 1/2" NPT (includes 2 steel port plugs)
• RPM range: 1500 - 6500 RPM
• Designed for idle to 5500 RPM range on Holden 304 V8 engines (per product description)
• Compatibility: Accepts late-model water necks, air conditioning, alternator, and HEI ignition systems in most VN EFI configurations

Fuel rails and fittings

• Does not work with factory OEM fuel rails; requires Aeroflow Fuel Rail Kit AF6999-4003.
• Includes AF6999-4003 components: 2 x Fuel Rails (-8ORB); -8AN crossover braided line with two 90-degree non full-flow taper fittings; 3 x -8AN to -8ORB fittings; 1 x -8ORB hex port plug; 6 x mounting brackets; 6 x M6 socket cap screws (25 mm UHL); 6 x M6 hex screws (10 mm UHL); 4 x M6 nuts.

Additional details

• Runners should be port-matched to your cylinder heads for optimal performance.
• Requires 14 mm short (33.60 mm) fuel injectors (sold separately).
• Designed for late-model Holden VN engine models EFI; for non-EFI applications, use A6010-4000.