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. Image is a representation. Actual product may vary

More From This Category

MANLEY Valve, Race Flo, Intake, 2.08 in. Head Dia., 0.3133 in. Stem Dia., 5.035 in. Length, For Chevrolet SB, Set of 8

MANLEY Valve, Race Flo, Intake, 2.08 in. Head Dia., 0.3133 in. Stem Dia., 5.035 in. Length, For Chevrolet SB, Set of 8

$296.10

View
MILODON Valve, Exhaust, Race, Stainless Steel, 1.60 in. Diameter, For Holden, 253 - 308, Each

MILODON Valve, Exhaust, Race, Stainless Steel, 1.60 in. Diameter, For Holden, 253 - 308, Each

$45.50

View
MANLEY Valve, Severe Duty, Intake, 2.25 in. Head Dia., 0.3085 in. Stem Dia., 5.424 in. Length, For Chrysler HEMI, Each

MANLEY Valve, Severe Duty, Intake, 2.25 in. Head Dia., 0.3085 in. Stem Dia., 5.424 in. Length, For Chrysler HEMI, Each

$56.11

View
MANLEY Valve, Race Master, Intake, 2.2 in. Head Dia., 0.311 in. Stem Dia., 5.11 in. Length, For Chevrolet SB, Each

MANLEY Valve, Race Master, Intake, 2.2 in. Head Dia., 0.311 in. Stem Dia., 5.11 in. Length, For Chevrolet SB, Each

$37.02

View
MANLEY Valve, Severe Duty, Intake, 1.84 in. Head Dia., 0.3415 in. Stem Dia., 5.14 in. Length, Each

MANLEY Valve, Severe Duty, Intake, 1.84 in. Head Dia., 0.3415 in. Stem Dia., 5.14 in. Length, Each

$58.03

View
MANLEY Valve, Severe Duty, Exhaust, 1.56 in. Head Dia., 0.3136 in. Stem Dia., 5.208 in. Length, For Chevrolet L83, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.56 in. Head Dia., 0.3136 in. Stem Dia., 5.208 in. Length, For Chevrolet L83, Set of 8

$448.82

View