PERF RPM CYLINDER HEAD BBC OVAL PORT BB CHEV COMPLETE

Description

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