Manley Valve - Exhaust, Valve-S/D 1.600,+.400 1993-chevrolet-camaro-esi3871565 polyurethane bushings are stiffer and

polyurethane bushings are stiffer and more resistant to deflection

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These work very well for drag racers who have lowered ride heights

All BBK Performance throttle bodies are designed to improve performance and they work with the vehicles factory tune

Optimized for autocross and hillclimb

Manley Valve - Exhaust, Valve-S/D 1.600,+.400 1993-chevrolet-camaro-esi3871565 polyurethane bushings are stiffer andManley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million cycles, while competitors failed after just