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, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Length, Set of 8

$2,603.48

MANLEY Valve, Race Flo, Intake, 2.05 in. Head Dia, 0.3125 in. Stem Dia, 5.176 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Flo, Intake, 2.05 in. Head Dia, 0.3125 in. Stem Dia, 5.176 in. Length, For Chrysler HEMI, Set of 8

$400.37

MILODON Valves, Intake, Race, Stainless Steel, 2.05 in. Dia, +.290 Long, For Chevrolet, Small Block, 350, 383, 400, Set of 8

MILODON Valves, Intake, Race, Stainless Steel, 2.05 in. Dia, +.290 Long, For Chevrolet, Small Block, 350, 383, 400, Set of 8

$461.61

MANLEY Valve, Custom, Titanium, .3135 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3135 in. Stem Dia, Set of 8

$2,550.76

COMP Cams Valve, Sportsman, Inconel, Exhaust, GM LS7, 1.615 in. Head, 5.590 in. Length, Set of 8

COMP Cams Valve, Sportsman, Inconel, Exhaust, GM LS7, 1.615 in. Head, 5.590 in. Length, Set of 8

$1,876.18

MANLEY Valve, Street Flo, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Length, SBC, Set of 8

MANLEY Valve, Street Flo, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Length, SBC, Set of 8

$280.36