Manley Valve - Exhaust, Valve-P/F 1.600,+.100 firebird Please research fitment before purchasing

Please research fitment before purchasing

Viscosity Index 158

lack of engine wear and ease of tuning

are too complex for the average person to be able to revalve

Manley Valve - Exhaust, Valve-P/F 1.600,+.100 firebird Please research fitment before purchasingManley 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