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, 0.311 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

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MANLEY Valve, Titanium, Intake, 2.325 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Each

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MANLEY Valve, Race Master, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 4.94 in. Length, SBC, Each

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MANLEY Valve, Extreme Duty, Exhaust, 1.615 in. Head Dia, 0.3136 in. Stem Dia, 5.23 in. Length, For Chevrolet LS7, Set of 8

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MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

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BBC 24° Stainless Steel 2.250 x 5.500 O.A.L 11/32 Stem Race Intake Valve, Set

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