Manley Valve - Exhaust, Valve-LS7 S/D 1.615 1987-pontiac-firebird-esi3246161 This two-point design solidly links

This two-point design solidly links the front strut towers

UMI’s trailing arms are crafted from 1” x 2” rectangular tubing with ¼” thick CNC machined mounting plates

with heavy-duty gussets and laser-cut mounting plates

Spring notes: The springs are designed for Chevrolet small block engines

Avg PPM 2200

Manley Valve - Exhaust, Valve-LS7 S/D 1.615 1987-pontiac-firebird-esi3246161 This two-point design solidly linksManley 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