Edelbrock PERFORMANCE RPM Cylinder Head [RUNNER 215cc | CHAMBER 73cc | SPARK PLUGS Straight Dual | VALVE SIZE IN. 2.165 EX. 1.650 | VALVE TRAIN Hyd. Roller | VALVE SPRINGS Conical | VALVE SEAT CI PM | MAX. LIFT .675 | RETAINER MATERIAL Chromoly Steel] (CHRYSLER HEMI) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS