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 Exhaust Valve, BBC 24° 1.880 x 5.450 O.A.L. Tulip Inconel, Set

AFR Exhaust Valve, BBC 24° 1.880 x 5.450 O.A.L. Tulip Inconel, Set

$898.75

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Set of 8

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Set of 8

$607.34

AFR Intake Valve, BBC 24° Stainless Steel 2.300 x 5.500 O.A.L. 11/32 Stem Race, Set

AFR Intake Valve, BBC 24° Stainless Steel 2.300 x 5.500 O.A.L. 11/32 Stem Race, Set

$436.85

MANLEY Valve, Street Flo, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.35 in. Length, BBC, Each

MANLEY Valve, Street Flo, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.35 in. Length, BBC, Each

$37.43

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

$380.66

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. STD 11/32 Tulip Race, Set

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. STD 11/32 Tulip Race, Set

$461.90