Intake Manifold Fir For Holden Commodore VN V8 253-304-308 Dual Plane 7594 Air GapSpecification This Intake Manifold Is A Dual Plane Design That Is Tuned For Excellent Throttle Response From Idle To 5500 RPM,Aiding In Fuel Vaporisation And Increasing Volumetric Effiiciency. Designed To Fit Both Early And Late Cylinder Head Bolt Hole Patterns,Pilot Holes Have Been Drilled On Each Side Of The Exhaust Crossover. Accepts Both Square Bore And Spread Bore Carbs. Does Not Have A Provision For External Heat Crossover. Black Powdercoated