1966 1967 1968 1969 1970 1971 1972 1973 1974 ALL CYLINDER HEAD

Part Number: 24502569

ALL  CYLINDER HEAD - Part Number 24502569
Cylinder Head Aluminum High Port 18-Degree. These CNC-ported aluminum 18-degree heads are designed for 350 9.1:1 compression NASCAR racing engines. The heads have additional 0.080-inch of material on the deck and 0.055-inch on the intake manifold flange to maintain port alignment. The heads come with 65-cc combustion chambers, but the deck surface can be machined to raise compression. The heads are recommended for 4.000-4.155-inch cylinder bores. Intake and exhaust valve seats are beryllium copper and valve guide material is manganese bronze. Note: Requires 2.15-inch intake valves and 1.625-inch exhaust valves. Physical Specifications: Intake runner volume: 256cc Combustion Chamber Volume: 65cc Intake Valve: 2.180 dia x 5.550 long Serdi cutter #'s: 1st cut - H1.1N1/ 2nd cut - H1.1N2 Exhaust Valve: 1.625 dia x 5.550 long Serdi Cutter #'s: 1st cut - H1X1/ 2nd cut - H1X2 Intake Port Opening at Gasket: 2.2H x 1.345 W Distance from floor to deck at gasket: 1.15 Intake Min. Cross Sectional Dim. 2.75 sq in. GM Performance Parts cylinder heads are created with GM premium-engineering, then cast and machined to our exacting manufacturing standards. GMPP cylinder heads are available as bare castings or complete cylinder head from service replacement castings to all-out competition applications.
Aluminum High Port 18-Degree 1966 1967 1968 1969 1970 1971 1972 1973 1974

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