Manley Intake Valve Set 11566-8; Race Flo 2.020 x 4.911 11/32 SS for SBC, SBF

Engine:262 to 400, 289 to 351W SBF. Intake Valves Series:Race Flo. Underhead Angle:Pro Flo 12 deg. Valve Tip Length:0.250 in. Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.