Description
Performer RPM 454-O Cylinder Heads – Single – Complete
BB Chevy Oval Port, 110cc chambers, great torque and horsepower up to 6500 rpm
ED60459
60459
Performer RPM heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. These heads give great torque and horsepower up to 6500 rpm.These oval port heads will support over 540 hp with 9.5:1 compression when used as part of the Total Power Package.Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response.Semi-open chamber design maximises efficiency with streetable compression ratios.Smaller-than-stock 11/32″ valve stems promote excellent flow and lighter valve weight.Combustion chamber volume: 110ccIntake runner volume: 290ccExhaust unner volume: 110ccIntake valve diameter: 2.19″Exhaust valve diameter: 1.88″Valve stem diameter: 11/32″Valve guides: Manganese bronzeDeck thickness: 9/16″Valve spring diameter: 1.55″Valve spring maximum lift: .700″Rocker stud: 7/16″Guide plate: Hardened SteelPushrod diameter: 3/8″Valve Angle: 26°Exhaust port location: StockSpark plug fitment: 14mm x 3/4″ reach, gasket seatMade In: USA
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