Manley Severe Duty series performance valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are made of superior materials, are fully machined and swirl polished, and are available with either undercut "Pro Flo" stems or straight stems.

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MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia., 0.3715 in. Stem Dia., 5.354 in. Length, BBC, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia., 0.3715 in. Stem Dia., 5.354 in. Length, BBC, Set of 8

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MANLEY Valve, Street Master, Intake, 2.02 in. Head Dia., 0.3415 in. Stem Dia., 4.911 in. Length, SBC, Each

MANLEY Valve, Street Master, Intake, 2.02 in. Head Dia., 0.3415 in. Stem Dia., 4.911 in. Length, SBC, Each

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MANLEY Valve, Race Master, Exhaust, Bead Loc, 43mm Head Dia., 0.312 in. Stem Dia., 5.356 Length, For Ford 6.2L, Set of 8

MANLEY Valve, Race Master, Exhaust, Bead Loc, 43mm Head Dia., 0.312 in. Stem Dia., 5.356 Length, For Ford 6.2L, Set of 8

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MANLEY Valve, Severe Duty, Exhaust, 1.575 in. Head Dia., 0.3136 in. Stem Dia., 4.923 in. Length, For Chevrolet LS1, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.575 in. Head Dia., 0.3136 in. Stem Dia., 4.923 in. Length, For Chevrolet LS1, Set of 8

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MANLEY Valve, Extreme Duty, Exhaust, Bead Loc, 1.95 in. Head Dia., 0.3715 in. Stem Dia., 5.12 in. Length, SBC, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, Bead Loc, 1.95 in. Head Dia., 0.3715 in. Stem Dia., 5.12 in. Length, SBC, Set of 8

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MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia., 0.3715 in. Stem Dia., 5.454 in. Length, SBC, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia., 0.3715 in. Stem Dia., 5.454 in. Length, SBC, Set of 8

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