Manley Valve - Exhaust, Valve-BBC S/D 1.940 1992-pontiac-firebird-esi4307584 The SB023 attaches to your

The SB023 attaches to your Mustang with billet aluminum end links and 88-durometer polyurethane bushings

non-adjustable tubular control arms for A-bodies (TCA039) are manufactured from heavy-duty 1

Features on-car adjustability for additional clearance and centering aftermarket rear ends

Shims may still be required on some applications

meaning it can be easily installed with simple hand tools with no modifications required

Manley Valve - Exhaust, Valve-BBC S/D 1.940 1992-pontiac-firebird-esi4307584 The SB023 attaches to yourManley 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