Quick view Compare Currently out of stock. Call or email us for order information or for ETA on part. MANLEY EXTREME DUTY VALVE: FORD MOD 4.6L/5.4L 38.5mm x 4.585" EXHAUST(SET) - 11633-8 MSRP: Was: Now: $574.46 Quick view Compare Currently out of stock. Call or email us for order information or for ETA on part.