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

MANLEY Valve, Race Flo, Exhaust, 1.56 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

MANLEY Valve, Race Flo, Exhaust, 1.56 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

$47.58

MANLEY Valve, Pro Flo, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.936 in. Length, SBC, Set of 8

MANLEY Valve, Pro Flo, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.936 in. Length, SBC, Set of 8

$607.34

BBC 18° 11/32 Victory Titanium 2.400 X 6.035 O.A.L. With Hardened Tip Race Intake Valve, Ea.

BBC 18° 11/32 Victory Titanium 2.400 X 6.035 O.A.L. With Hardened Tip Race Intake Valve, Ea.

$279.74

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.011 in. Length, SBC, Set of 8

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.011 in. Length, SBC, Set of 8

$607.34

MILODON Valves, Intake, Race, Stainless Steel, 2.05 in. Dia, +.250 Long, For Chevrolet, Small Block, 350, 383, 400, Set of 8

MILODON Valves, Intake, Race, Stainless Steel, 2.05 in. Dia, +.250 Long, For Chevrolet, Small Block, 350, 383, 400, Set of 8

$485.70

MANLEY Valve, Race Master, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, For Chevrolet SB, Set of 8

MANLEY Valve, Race Master, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, For Chevrolet SB, Set of 8

$380.66