This new Performer cylinder head is designed as a bolt-on performance upgrade for 1987-2006 Jeeps with a 4.0L inline six cylinder engine. The Performer Jeep 4.0L is designed with 1991-2006 4.0L intake port locations and must be used with 1991-2006 intake manifold. The Performer Jeep 4.0L is designed with 1991-98 4.0L exhaust port locations and must be used with 1991-98 factory header or aftermarket exhaust header. This cylinder head will also fit 1976-90 AMC 4.2L engines with no modification to the water jacket and the appropriate intake manifold and header combination.

The Performer Jeep 4.0L is designed with 1991-2006 4.0L intake port locations and must be used with 1991-2006 intake manifold. The Performer Jeep 4.0L is designed with 1991-98 4.0L exhaust port locations and must be used with 1991-98 factory header or 19991-2006 aftermarket exhaust header. This cylinder head will also fit 1976-90 AMC 4.2L engines with no modification to the water jacket and the appropriate intake manifold and header combination.

Features Include:

• Designed for 1987-2006 Jeep 4.0L inline six cylinder engines
• Can be used with 1976-90 AMC 4.2L engines with no modification to the water jacket and the appropriate intake manifold and header combination
• Available with 55cc combustion chambers, 144cc intake and 77cc exhaust runners, 1.91″ intake and 1.50″ exhaust valve sizes for up to 0.540″ max lift
• Sold bare (#50159) and complete (#50169) with springs engineered for hydraulic flat tappet camshaft applications

This cylinder head is pending 50-state emission legal for 4.0L engines when used with factory Fuel Injection components. It’s also pending 50-state emission legal for 4.2L engines when used with a Mopar Fuel Injection Conversion Kit (E.O. Number D-265-21).

More information on Edelbrock Performer Jeep 4.0l Cylinder Head.