Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.

More From This Category

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 4.900 O.A.L. Stud Mount Race, 1 Ea.

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 4.900 O.A.L. Stud Mount Race, 1 Ea.

$38.96

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Set of 8

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Set of 8

$380.66

MANLEY Valve, Race Flo, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, For Ford SB, Set of 8

MANLEY Valve, Race Flo, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, For Ford SB, Set of 8

$380.66

MANLEY Valve, Race Flo, Exhaust, 1.465 in. Head Dia, 0.3415 in. Stem Dia, 5.08 in. Length, For Ford SB, Set of 8

MANLEY Valve, Race Flo, Exhaust, 1.465 in. Head Dia, 0.3415 in. Stem Dia, 5.08 in. Length, For Ford SB, Set of 8

$380.66

AFR Intake Valve, BBF 11/32” Stainless Steel 2.300 X 5.245 O.A.L. Race, Set

AFR Intake Valve, BBF 11/32” Stainless Steel 2.300 X 5.245 O.A.L. Race, Set

$436.85