10051101


10051101 - Raised Runner Aluminum Bow Tie Head


The intake runners in this Bow Tie cylinder head (casting P/N 10051101) are .200" higher than the small-block Chevy's stock port location. These raised runners enhance engine airflow and increase horsepower. The .240" minimum wall thickness allows extensive port modifications. The rocker cover rails are raised .300" and the intake manifold flange is stepped to improve gasket sealing. The raised runner head's 55cc combustion chambers enhance combustion efficiency and suppress detonation. These small chambers yield high compression ratios even with small piston domes. The spark plug holes are machined for 3/4" reach plugs with gasketed or tapered seats. The minimum deck thickness is .600-inch.
Technical Notes: The raised runner head is sold without valve guides and seats. The raised port design requires aftermarket valves which are .100" longer than stock. Production valves can be used by remachining spring pockets. Pushrod clearance holes are deleted to allow widening of the intake ports. Pushrod guideplates P/N 14011051 are required with raised runner heads. Raised runner intake manifold P/N 10051103 is recommended for all single four-barrel applications.