Offenhauser 5915 Tunnel Ram Dual Quad Top

Description

Offenhauser 5915 Dual Quad Top. Use Holley carbs only. For Ford 289-302.

The 5915 dual quad top is paired with tunnel ram base part number 5914.

RPM Range and Horsepower Increase: – The Offenhauser tunnel ram with the 5915 top is designed for mid- to high-RPM performance, usually starting to make power above 2,000 RPM. – With the right combination (engine build, cam, dual quads), these tunnel rams are typically used up to 6,000+ RPM and are good in race or high-performance street applications. – Exact horsepower gain will depend on the rest of your setup, but tunnel rams are known for significant power increases at higher RPM when compared to traditional dual plane intakes. – Dual quad tunnel rams paired with two carburetors (usually 600-650 CFM each) are optimal for this kind of manifold.