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: 110cc
Intake runner volume: 290cc
Exhaust unner volume: 110cc
Intake valve diameter: 2.19"
Exhaust valve diameter: 1.88"
Valve stem diameter: 11/32"
Valve guides: Manganese bronze
Deck thickness: 9/16"
Valve spring diameter: 1.55"
Valve spring maximum lift: .700"
Rocker stud: 7/16"
Guide plate: Hardened Steel
Pushrod diameter: 3/8"
Valve Angle: 26°
Exhaust port location: Stock
Spark plug fitment: 14mm x 3/4" reach, gasket seat
Made In: USA