Edelbrock 50159 Performer Bare Cylinder Head for 91-06 Jeep 4.0L Inline Six

The Edelbrock 50159 Performer Cylinder Head delivers a significant bolt-on performance upgrade for 1987-2006 Jeep vehicles equipped with the 4.0L inline six engine. This bare cylinder head features optimized intake and exhaust port designs that improve airflow, combined with a modern combustion chamber and back cut, swirl polished valves for enhanced engine efficiency and power output.

Key Performance Features:

• Improved flowing intake and exhaust ports for better engine breathing
• Modern combustion chamber design optimizes fuel burn and power delivery
• Back cut and swirl polished valves enhance airflow characteristics
• Retains stock valve angle, pushrod length, and valve cover bolt pattern for easy installation
• Larger reinforced rocker bosses provide increased strength at high RPM operation
• Heli-Coil threaded inserts in intake manifold bolt holes for superior durability
• 3/4-inch deck thickness throughout promotes rigidity and longevity
• Machined to accept both distributor and coil pack ignition systems

Compatibility Requirements:

This cylinder head is engineered with 1991-2006 4.0L intake port locations and 1991-1998 4.0L exhaust port sizing. It must be paired with a 1991-2006 intake manifold and either a 1991-1998 exhaust manifold or aftermarket exhaust headers. For 1999-2006 applications, aftermarket headers are required as this head is not compatible with OEM exhaust manifolds from those model years. Always verify header compatibility with your exhaust manufacturer.

This is a bare cylinder head and does not include valvetrain components. Compatible with factory accessories and off-the-shelf performance parts for easy integration into your Jeep 4.0L build.