Representative Image Edelbrock Performer RPM Cylinder Head - 61525 Part #: 61525 Line: EDB Edelbrock Performer RPM Cylinder Head 90 Day Limited Warranty Material: Aluminum Valve Stem Size (in): 0.343 Inch Retainer Included: Yes Valve Angle (Deg): 14 Degree Exhaust Valve Diameter (in): 1.66 Inch Intake Valve Diameter (in): 2.11 Inch Camshaft Type: Hydraulic Roller Show More Show Less