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

Trick Flow Valve, Intake, Stainless Steel, 2.080 in. Diameter, 8.0mm Stem, 4.900 in. Length, GenX® 235, GM LS, Each

Trick Flow Valve, Intake, Stainless Steel, 2.080 in. Diameter, 8.0mm Stem, 4.900 in. Length, GenX® 235, GM LS, Each

$65.93

View
MANLEY Valve, Severe Duty, Intake, 2.072 in. Head Dia., 0.3415 in. Stem Dia., 4.713 in. Length, Set of 8

MANLEY Valve, Severe Duty, Intake, 2.072 in. Head Dia., 0.3415 in. Stem Dia., 4.713 in. Length, Set of 8

$448.82

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

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

$226.16

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

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

$206.22

View
MANLEY Valve, Race Master, Intake, 39.0 mm Head Dia., 7 mm Stem Dia., 99.0 mm Length, For Toyota 1FZ-FE, Set of 12

MANLEY Valve, Race Master, Intake, 39.0 mm Head Dia., 7 mm Stem Dia., 99.0 mm Length, For Toyota 1FZ-FE, Set of 12

$597.57

View
MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia., 0.3415 in. Stem Dia., 5.021 in. Length, SBC, Each

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia., 0.3415 in. Stem Dia., 5.021 in. Length, SBC, Each

$56.11

View