Manley Valve - Exhaust, Valve-SBC S/D 1.500 1988-pontiac-firebird-esi5674963 These reinforcements are specifically designed

These reinforcements are specifically designed to strengthen these weak points in the chassis

These patented BBK Performance Varitune mufflers are the first of their kind in the aftermarket

Available in red or black powder coat

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

Manley Valve - Exhaust, Valve-SBC S/D 1.500 1988-pontiac-firebird-esi5674963 These reinforcements are specifically designedManley 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