• 100cc semi-open chamber heads feature a 1-1/2Á rolled over (angle milled) design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves
  
• 8.8:1 compression ratio when used on 1987-up TBI-equipped 7.4L dished piston motors
  * Produced over 450 ft/lbs. torque when combined with our Multi-Point EFI System in a late model 1987-95 application

Item Code	EDE-60489
Vendor Name	Edelbrock
Product Type	Cylinder Head
Product Model	Performer High-Compression
Application	C/BB
Engine Family	CHEVROLET - Big Block
Material	Aluminum
Finish	Natural
Cylinder Head Style	Bare
Combustion Chamber Volume (cc)	110cc
Intake Runner Volume (cc)	290cc
Exhaust Runner Volume (cc)	110cc
CNC Machined Combustion Chamber	No
CNC Machined Intake Runner	No
CNC Machined Exhaust Runner	No
Combustion Chamber Style	Semi-Open
Intake Port Shape	Oval
Intake Port Location	Standard
Exhaust Port Shape	Square
Exhaust Port Location	Standard
Valves Included	No
Intake Valve Diameter (in)	2.190"
Exhaust Valve Diameter (in)	1.880"
Valve Springs Included	No
Maximum Valve Lift (in)	0.700"
Outside Diameter of Outer Spring (in)	1.550"
Damper Spring Included	No
Retainers Included	No
Valve Locks Included	No
Valve Stem Seals Included	No
Rocker Arm Studs Included	No
Rocker Arm Nuts Included	No
Rocker Arms Included	No
Guideplates Included	No
Accessory Holes Drilled	Yes
Valve Guides Included	Yes
Quantity	Sold individually.