Edelbrock 50149 Victor CNC Cylinder Head for Jeep 242 4.0L Inline-SixThis Victor CNC cylinder head for Jeep 4. 0L inline six engines is fully CNC ported, featuring 182 cc intake ports, 77 cc exhaust ports, and 55 cc combustion chambers, with a valve job to match the COMP Cams LS style 8 mm valvetrain. UPC 085347899203 Series Victor Material Aluminum Quantity Sold Individually Availability Note Available to Order Warranty 12 Months Emissions Code Features and Benefits This cylinder head must be used with a 1991 2006