Manley Valve - Exhaust, Valve-S/D 1.625,+.700 1987-pontiac-firebird-esi3246161 UMI's front frame brace enhances

UMI's front frame brace enhances chassis rigidity

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

With this design you can easily adjust camber track side and have the caster set at one of two settings( Stock or +1°)

or precise cornering performance

FX4 and Platinum edition - New Electronics Installed

Manley Valve - Exhaust, Valve-S/D 1.625,+.700 1987-pontiac-firebird-esi3246161 UMI's front frame brace enhancesManley 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