Manley Valve - Exhaust, Valve-SBC S/D 1.500 1988-pontiac-firebird-esi5674963 precision machined piston with a

precision machined piston with a deflective disc and a P

BMR Suspensions HCS760 Harness Crotch Strap is available in black hammertone and red powdercoat for long-lasting good looks

pinion angle

BMRs Non-Adjustable Rear Sway Bar Kit (SB021) increases sway bar rate and is designed for street performance

Manley Valve - Exhaust, Valve-SBC S/D 1.500 1988-pontiac-firebird-esi5674963 precision machined piston with aManley 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