By now, the LS community is well versed about the LSX Intake Manifold from FAST. Testing has shown proven horsepower gains with the LSX manifold, however, this intake only fit LS1-style, cathedral-port heads leaving LS3/L92-style, rectangle-port heads without an intake upgrade solution. Until now…
The engineers at FAST teamed up with the airflow specialists at RHS to develop a three-piece, polymer intake manifold for rectangular port GM LS3/L92 engines. Testing on a stock LS3 engine with a Big Mouth 102mm Throttle Body™ produced gains of 14+ horsepower and 11ft/lbs of torque at the flywheel over the stock intake.
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