Manley Valve - Exhaust, Valve-S/D 1.625,+.600 1989-pontiac-firebird-esi6878223 250” chromoly handling sway bar

250” chromoly handling sway bar for better cornering

These new manufactured boxed control arms are a direct bolt in designed to replace the factory stamped control arms

BMR Suspensions Tubular K-members drop weight and add loads of structural rigidity

Use on trucks that have the UMI rear flip kit installed

Manley Valve - Exhaust, Valve-S/D 1.625,+.600 1989-pontiac-firebird-esi6878223 250” chromoly handling sway barManley 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