"Fully Modified" Cast Iron Small Block Chevy Intakes
20 to 51 Horsepower Gain Over Stock Manifolds!
Our Fully Modified intakes are more extensively ported Stage 1 manifolds. They are the most powerful cast iron intakes available anywhere. Fully modified intakes have a modified plenum area, are port matched, and modified through four access port areas. 100% of internal area is modified. This is the most extensively modified cast iron intake available. Compare for yourself with the dyno tests.
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#201 Fully Modified 2 barrel 33 Horsepower gain @ 6500 RPM.
 #401 Fully Modified Q-Jet
51 Horsepower gain @ 7000 RPM
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