Manley Street Flo valves are excellent-quality valves at an affordable price. All are made from stainless steel (intakes are NK-841; exhausts are XH-424) with chrome stems and hardened valve tips. Street Flo series valves are fully machined and swirl polished, and both the materials used and the heat-treating process are superior to those of the Budget replacement series valves. They're available in a variety of head diameters, with either straight stems or undercut "Pro Flo" stems for increased flow. Order the set that's compatible with your vehicle and engine application.

More From This Category

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3133 in. Stem Dia, 4.935 in. Length, For Chevrolet SB, Set of 8

MANLEY Valve, Pro Flo, Intake, 2.08 in. Head Dia, 0.3133 in. Stem Dia, 4.935 in. Length, For Chevrolet SB, Set of 8

$628.35

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

$318.84

MANLEY Valve, Extreme Duty, Exhaust, 37.5mm Head Dia, 0.2345 in. Stem Dia, 4.585 Length, For Ford, Each

MANLEY Valve, Extreme Duty, Exhaust, 37.5mm Head Dia, 0.2345 in. Stem Dia, 4.585 Length, For Ford, Each

$129.64

Sonnax Oversized C2 Apply Control Valve Kit, U660E/F, U760E/F, Each

Sonnax Oversized C2 Apply Control Valve Kit, U660E/F, U760E/F, Each

$88.71

MANLEY Valve, Pro Flo, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

MANLEY Valve, Pro Flo, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Each

$75.93

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

$302.72