To finish out our testing, Martin bolted the Ford Racing intake manifold back onto our test mule. The final combination of the Ford Racing Three-Valve intake manifold, Hot Rod cams, and Stage 3 CNC-ported cylinder heads produced 431.6 hp and 365.3 lb-ft of torque. When we started, the stock Three-Valve made 359 flywheel horsepower. In fully modded form, the engine made 430 flywheel horsepower for a gain of 80 horsepower. Not bad for an intake manifold that costs around $550!