Manley Valve - Exhaust, Valve-S/D 1.625,+.700 1987-pontiac-firebird-esi3246161 UMI’s complete kit replaces the

UMI’s complete kit replaces the weak

Drag ''R'' Series and non-adjustable shocks for 63-87 Chevy C-10 Pickups

Other roll bars on the market mount to either the balsa wood composite floor or the thin sheet metal above the gas tanks

These direct replacements for factory arms reduce wheel hop

UMI's front frame brace enhances chassis rigidity

Manley Valve - Exhaust, Valve-S/D 1.625,+.700 1987-pontiac-firebird-esi3246161 UMI’s complete kit replaces theManley 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