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

Sonnax Boost Valve Kit, 4L80E, 4L85E, Each

Sonnax Boost Valve Kit, 4L80E, 4L85E, Each

$37.26

MANLEY Valve, Race Master, Exhaust, 1.654 in. Head Dia., 0.3125 in. Stem Dia., 5.1 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.654 in. Head Dia., 0.3125 in. Stem Dia., 5.1 in. Length, For Chrysler HEMI, Set of 8

$290.09

MANLEY Valve, Race Flo, Intake, 39.5 mm Head Dia., 6.96 mm Stem Dia., 100.21 mm Length, For Nissan Patrol, Set of 12

MANLEY Valve, Race Flo, Intake, 39.5 mm Head Dia., 6.96 mm Stem Dia., 100.21 mm Length, For Nissan Patrol, Set of 12

$682.24

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia., 0.311 in. Stem Dia., 5.14 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia., 0.311 in. Stem Dia., 5.14 in. Height, Each

$227.37

Sonnax Throttle Valve, GM, 4L60, Each

Sonnax Throttle Valve, GM, 4L60, Each

$58.23

MANLEY Valve, Race Master, Exhaust, 1.74 in. Head Dia., 0.3715 in. Stem Dia., 5.01 in. Length, For Chrysler, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.74 in. Head Dia., 0.3715 in. Stem Dia., 5.01 in. Length, For Chrysler, Set of 8

$275.90