Manley Ford 4.6L 38.5mm Race Master & Extreme Duty Exhaust Valves *Set of 8*

Manley Ford 4.6L 38.5mm Race Master & Extreme Duty Exhaust Valves Set of 8

Marsoni

M251S

$274.20

Get it in 3 business days with 1 day shipping. Friday, May 29

Manley Ford 4.6L 38.5mm Race Master & Extreme Duty Exhaust Valves *Set of 8*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. This Part Fits: Year Make Model Submodel 2007 2008 Ford F 150 FX2 2005 2008 Ford F 150 FX4 2006 2008 Ford F

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Edit: Still holding proper pressure at 2-months !!! Had a slow leak where my tire went from 44psi to ~18psi over 2-3 days… Dashboard light would let me know every few days that I had a tire problem and I would inflate the tire back up to 44psi… Anyway, I used this product and filled air back to 44 psi and it’s held the pressure for a month already !!!! Be sure to deflate tire to ~15 PSI before adding the product… it only took about 30 seconds to empty the container into my tire with the tire pressure low. Very happy with this product !!!

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Reviewed in the United States on April 6, 2026