This is an EXHAUST Valve for 1950-1970 Chevrolet passenger cars & trucks with 6 Cylinder & V-8 engines. Dimensions: Two Grooves - Head Dia. 1.500", Overall Length (margin to tip) 4.923", Stem Dia. .341", Seat Angle 45 degrees. Replaces GM# 3731212, 3835639 Specific Applications" 1950-1952 - 216 CID Engines; 1950-1962 - 235 CID Engines; 1954-1962 - 261 CID Engines; 1955-1956 - 265 V-8 with hydraulic lifters & 2BBL Carburetor; 1957-1966 - 283 CID Engines; 1960-1967 - 153 CID Engines; 1962-1967 - 194 CID Engines; 1962-1969 - 327 CID Engines; 1963-1970 - 250 CID Engines; 1963-1979 - 292 CID Engines; 1968-1973 - 307 CID Engines; 1967-1978 - 350 CID Engines

This is a Pair of Valve Stem Keepers "U-Shaped" for 1934-1972 Chevrolet six & eight cylinder engines. These key clips are sold in a pair for one valve. Used on valves with annular grooves. Replaces GM# 838029

This is a new Valve Spring for 1954-1963 Chevrolet cars & trucks with 6-cylinder engines. Fits both Intake & Exhaust. Sold Each, 12 pieces required. Dimensions: Uninstalled free height 2.210" OL x 1.336" OD, 7 Coils, Compress to 1.528", Pressure Max 168, Pressure Min 158. Replaces GM# 3704142, 3836640. DOES NOT FIT 1959-1963 235CID engines - See FS-976. Specific Applications: 1954-1955 Passenger with Powerglide (6-cylinder); 1954-1955 (1st Series) Truck with 261 CID; 1956-1958 All with 235 CID; 1962-1963 All with 261 CID