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, 1.9 in. Head Dia, 0.311 in. Stem Dia, 5.422 in. Length, BBC, Set of 8

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MANLEY Valve, Race Master, Intake, Bead Loc, 48mm in. Head Dia, 0.313 in. Stem Dia, 4.606 in. Length, Volkswagen, Each

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MANLEY Valve, Pro Flo, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.011 in. Length, BBC, Each

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MANLEY Valve, Severe Duty, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, Set of 8

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MANLEY Valve, Race Flo, Intake, 32.5mm in. Head Dia, 5.48mm in. Stem Dia, 103.55mm in. Length, For Ford 2.3L, Each

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