Manley Performance · New
Manley Ford 4.6L/5.4L Small Block SOHC Extreme Duty Exhaust Valves (Set of 8)
MPN 11631B-8 · Store SKU man11631B-8
Supplier stock checked 11/7/2026, 6:56:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Discover the extraordinary capabilities of Manley Performance Products' Extreme Duty Series Valves. Engineered to cater to the demanding needs of Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors, these valves are your ticket to unparalleled performance. Manley Valve - Exhaust, Valve-FD MOD Extreme Duty 37.5mm Manley Valve - Exhaust, Valve-FD MOD E/D 37.5mm
Manufacturer fitment & guides
Check 11631B-8 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- California Proposition 65: Y