Manley Valve - Exhaust, Valve-S/D 1.625,+.600 1989-pontiac-firebird-esi6878223 dash rattles and quarter panel

dash rattles and quarter panel flexing

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

50 state legal - CARB approved

250” chromoly handling sway bar for better cornering

Rod ends are the ultimate in smoothness and articulation where a full race system is desired

Manley Valve - Exhaust, Valve-S/D 1.625,+.600 1989-pontiac-firebird-esi6878223 dash rattles and quarter panelManley 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