November 2011 Chevy High Performance Parts - CHP Parts

Striving to provide race level performance in a streetable design, Edelbrock now offers the RPM Xtreme cylinder heads for 427-572ci big-block applications.Big Breathers
CNC Big-Block Cylinder Heads
Striving to provide race level performance in a streetable design, Edelbrock now offers the RPM Xtreme cylinder heads for 427-572ci big-block applications. These feature CNC machined runners and combustion chambers whose flow is nearly on par with the Victor series professional race heads. The deck has been rolled 1.5 degrees to improve the intake and valve angle, including port velocity. The well thought out design also ensures that the 2.25/1.88-inch intake/exhaust valves still clear the factory valve reliefs. You get your choice of 300cc (oval) with 110cc chambers or 325cc (rectangular) versions with 118cc chamber volumes. All cylinder heads are hand assembled at Edelbrock's headquarters and carry a 1-year warranty. In addition, the RPM XT heads accept most stock port location exhaust headers. Installation is the same as a factory set of heads, making this an easy bolt-on upgrade.


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