PRODUCT DESCRIPTION
Fit: 1991-2006 4.0L
This cylinder head must be used with a 1991-2006 intake manifold and a 1991-1998 exhaust manifold. Aftermarket exhaust headers can also be used in place of 1991-1998 exhaust manifolds and MUST be used in place of 1999-2006 exhaust manifolds. Most aftermarket exhaust headers are compatible, but please check with the exhaust header manufacture to verify. This head is NOT compatible with 1999-2006 OEM exhaust manifolds.
Threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability.
This cylinder head will also swap onto all AMC Inline six 4.2L engines. However, this swap will require the use of a 4.0L 1991-2006 intake & exhaust manifolds. No modifications are required to the water jacket when swapping an Edelbrock Jeep Performer 4.0L head onto a 4.2L.
Application Summary
This cylinder head is a direct bolt-on to 1991-2006 applications originally using 7120, 0360, and 0331 castings. This head will also bolt onto 1987-90 engines (2686 casting) with the 1991-2006 intake manifolds & 1991-1998 exhaust manifolds or aftermarket headers. This cylinder head will also swap onto all AMC Inline six 4.2L engines. However, this swap will require the use of a 4.0L 1991-2006 intake & exhaust manifolds. No modifications are required to the water jacket when swapping an Edelbrock Jeep Performer 4.0L head onto a 4.2L.
Installation Notes
CNC combustion chamber 59 ± 1cc (57 ± 1cc stock) - 10 degree valve angle (stock) - 3.875" bore (stock) - Stock head bolt pattern - 1991-1998 intake & exhaust manifold bolt pattern and port locations - Stock pushrod length - Stock valve-train geometry - Larger diameter reinforced rocker bosses - Stock valve cover location & bolt pattern - Accepts distributor ignition or coil rail ignition .750" deck thickness
