Manley Valve - Exhaust, Valve-S/D 1.600,+.100 1999-ford-f-150-esi4281697 bolts directly in place with

bolts directly in place with no modifications

2406 - 1974-1992 GM F-Body

Lowered Vehicles: Relocation brackets are a must for all lowered vehicles to correct lost suspension geometry

Castrol BOT 130M

Manley Valve - Exhaust, Valve-S/D 1.600,+.100 1999-ford-f-150-esi4281697 bolts directly in place withManley 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