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Single-adjustable shocks are perfect for street-driven trucks that see occasional time on the track
The UMI P/N 2999 adds the finishing touch to allow full articulation of the GM 4-link rear suspension
Over time factory control arms rust which can weaken them while the factory bushings dry rot
DOT approved
This entire kit is manufacture by UMI Performance and made in the USA
Manley Valve - Intake, Valve-S/D 2.190 2002 pontiac firebird Single-adjustable shocks are perfect forManley 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
