Pay in 4 interest-free payments of $37.63 Learn more
Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
Shims may still be required on some applications
The SB023 attaches to your Mustang with billet aluminum end links and 88-durometer polyurethane bushings
meaning it can be easily installed with simple hand tools with no modifications required
They also allow for freer movement
Our Double Adjuster is machined from 4130 Chromoly
Manley Valve - Exhaust, Valve-BBC S/D 1.940 1992-pontiac-firebird-esi4307584 Shims may still be requiredManley 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
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