Performer Big-Block Chevy Oval Port Hydraulic Flat Tappet Springs

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The Edelbrock #60489 Performer Bare High Compression Cylinder Heads are designed for Big-Block Chevy Oval Port V8 applications. These Edelbrock Performer Series Cylinder heads are 50-state street legal and provide outstanding performance from Idle-5,500 RPM’s. The Edelbrock Performer heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. They also feature the highest quality intake and exhaust valves and valve springs.


Availability Available
Application Application Specific
GTIN 00085347604890
Availability Note Available to Order
Warranty 12 Months
Emissions Code
EO Number: D-215-94
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • #60489 Intake entry and exhaust exists are not profiled.
  • Match with Edelbrock head gasket sets.
  • Bare heads will have valve guides and seats installed, but will require final sizing & a valve job to match the valves you will be using.
  • Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC).
  • 100cc semi-open chamber cylinder heads feature a 1-1/2° rolled over (angle milled) design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves
  • 9.2:1 compression with flat-top pistons for an outstanding high performance street head
  • 8.8:1 compression ratio when used on 1987-95 TBI-equipped 7.4L dished piston engines
  • Performer applications include heat crossover passage for emissions related engines
  • Performer 454-O are 50-state street legal
CNC Ported No
Combustion Chamber Volume 100.0 cc
Deck Height 9.8 in
Deck Thickness 0.562 in
Guide Plates Included Yes
Intake Runner Volume 290.0 cc
Material Aluminum
Push Rod Diameter 0.375 in
Valve Angle 26 deg