Edelbrock 4.0-Liter Jeep Engine Head

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Jeep Engine Head

Jeep Engine Head

The new Edelbrock Performer cylinder head for the 4.0-liter inline six-cylinder engine is the new topic revolving among the off roaders.

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. It features all-new better flowing intake and exhaust ports, a modern combustion chamber design with back cut and swirl polished valves. It retains the stock valve angle, pushrod length and valve cover bolt rail height for use with factory components and off the shelf accessories.

It also features larger reinforced rocker bosses for improved strength at high RPM and Heli-Coil threaded inserts in the manifold bolt holes for added strength. A 3/4″ deck throughout the head also provides improved durability. It’s machined to accept either distributor or coil pack ignition.

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.

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 AMC 4.2L engines when used with a Mopar Fuel Injection Conversion Kit (E.O. Number D-265-21).

Designed as a bolt-on performance upgrade for 1987-2006 Jeeps with 4.0L inline six cylinder engine. This cylinder head is designed with the 1991-2006 4.0L intake port locations and must be used with 1991-2006 intake manifold, while the exhaust side features the 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 cylinder head features all-new better flowing intake/exhaust ports along, modern combustion chamber design with back-cut and swirl polished valves.

It retains the stock valve angle, pushrod length and valve cover rail height for use with factory components and other off the shelf accessories. It also features larger reinforced rocker bosses for improved strength at high RPM and Heli-Coil threaded inserts in the manifold bolt holes for added strength. A 3/4” deck thickness throughout the head also promotes stiffness and durability. Edelbrock also machined provisions on this cylinder head to accept either distributor or coil pack ignition.

The new Edelbrock Performer 4.0-liter Jeep engine head features larger reinforced rocker bosses for improved strength at high RPM, and Heli-Coil threaded inserts in the manifold bolt holes for added strength. A 3/4-inch deck throughout the head also provides improved durability, and the head is machined to accept either distributor or coil pack ignition.
It has big, thick port walls so you can go in there and hog out the ports more if you want. The deck is extra thick too, so you can deck the thing about 30 or 40 to get into some higher compression ranges. You’re going to have to run higher octane fuel, but there’s a lot of power potential there which means it’s going to be really fun to see what the Jeep crowd does with it.

Some of the Key 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

There are a ton of shopping cart/mass retailers on the internet that are eager to sell you parts. The problem is most don’t really understand what components work best together. That comes with research and knowing the product inside and out. TDmotion are very price competitive and align themselves with some of the best Manufacturer Aftermarket names in the biz – Edelbrock, Holley, MSD, Comp Cams etc.

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