Enginetech Part Number: EHJ242-1 Bare Cylinder Head Fits Jeep Cherokee, Grand Cherokee 4.0L 242 56cc Chamber. .3135 Guide ID Valve Head Diameter: Intake 1.910 Exhaust 1.500
Enginetech Part Number: EHCR239-1 Bare Cylinder Head Fits Chrysler 3.9L 239 ?52cc. Casting #6680 .3126 Guide ID Valve Head Diameter: Intake 1.920 Exhaust 1.624.