Manley Valve - Exhaust, Valve-S/D 1.600,+.100 1999 pontiac firebird This kit offers huge increases

This kit offers huge increases in performance over the stock rubber bushings

Installation is straightforward and requires no welding

These high gas pressure monotube shock absorbers are sold by various lengths and valve rates to accommodate a wide range of uses and custom fitments

The panhard bar greatly increases rear end stability

Manley Valve - Exhaust, Valve-S/D 1.600,+.100 1999 pontiac firebird This kit offers huge increasesManley 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