Enginetech Part Number: EHCR135-1 Bare Cylinder Head Fits Chrysler 2.2L 135 & 2.5L 153 51cc Chamber .3145 Guide ID Valve Head Diameter: Intake 1.598 Exhaust 1.394.
Enginetech Part Number: EHCR226L-1 Bare Cylinder Head (Left Hand) Fits Chrysler & Jeep 3.7L 226 SOHC D Shaped Chamber .2752 Guide ID Valve Head Diameter: Intake 1.917 Exhaust 1.457.