Manley Valve - Exhaust, Valve-S/D 1.900,+.100 corvette 75-to-1 sealed gear-reduction drive and

75-to-1 sealed gear-reduction drive and full ball bearing construction

giving you a lightweight yet extremely strong performance upgrade

Drag- Stage 1

A must for Sprint

Black Anodized Construction

Manley Valve - Exhaust, Valve-S/D 1.900,+.100 corvette 75-to-1 sealed gear-reduction drive 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