60899 Cylinder Head Performer Rpm

Designed for CID small block Chevy engines, these performer cylinder heads are fully assembled and ready to Bolt-On or bare for use with your own Valve train components. Features include high quality stainless steel 2.02 In. intake and 1.60 In. exhaust valves, choice of 64 Cubic Centimeters or 70 Cubic Centimeters combustion chambers and high flow 185 Cubic Centimeters intake and 65 Cubic Centimeters exhaust ports. Intake and exhaust runners are hand blended in the bowl area and the intake entries and exhaust exits are CNC profiled for increased air flow. These heads include adjustable rocker stud and guide plate Set-Up for use with adjustable rockers. The casting is manufactured of A356 aluminum and heat treated to T6 spec for superior quality. An extra thick 5/8 In. deck and Heli-Coil threaded inserts offer improved durability. Heat crossover is machined for 50 state emissions legal performance.

• Engine Compatibility - Chevy Small Block.
• Style - Assembled.
• Finish - Natural.
• Material - Aluminum.
• Combustion Chamber Volume (cc) - 64 Cubic Centimeter.
• Valve Diameter - 2.02 In. Intake/ 1.6 In. Exhaust.
• Includes Valves - Yes.
• Spark Plug Angle - Straight.
• Includes Rocker Arm Studs - Yes.
• Rocker Arm Nut Thread Size - 3/8 In.
• Valve Lock Type - 23 Degree.
• Valve Guide Material - Manganese Bronze.
• Number Of Springs Per Valve - 1.
• Includes Guideplates - Yes.
• Runner Volume (cc) - 185 Intake/ 65 Exhaust Cubic Centimeter.
• Its fits for various makes and models.