60259 Cylinder Head Performer Rpm

Performer heads are 50 state emissions legal and are designed to fit emissions related engines. 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. Features -Engine Compatibility - Ford Windsor 4.7L-5.8L/ 289-351 Cubic In. -Style - Assembled. -Finish - Natural. -Material - Aluminum. -Combustion Chamber Volume cc - 60 Cubic Centimeter. -Valve Diameter - 2.02 In. Intake/ 1.6 In. Exhaust. -Includes Valves - Yes. -Includes Rocker Arm Studs - Yes. -Rocker Arm Nut Thread Size - 3/8 In. -Valve Lock Type - 20 Degree. -Valve Guide Material - Manganese Bronze. -Number Of Springs Per Valve - 1. -Includes Guideplates - Yes. -Runner Volume cc - 170 Intake/ 60 Exhaust Cubic Centimeter. -Maximum Performance In The 1500 To 6500 RPM Range For High Performance Street. -1.90 In. Intake Valves Are For Use With Stock Pistons And High Flow 2.02 In. Intake Valves Work With Pistons Notched For Valve Clearance. -Its fits for various makes & Model.