Edelbrock Cylinder Head, Performer, Jeep, 4.0L I6, Complete
Performer Cylinder Heads For Jeep 4.0l Inline Six
The Performer cylinder head Designed as a bolt-on performance upgrade for 1987-2006 Jeep's with a 4.0L inline six engine. They feature better flowing intake/exhaust ports along with a modern combustion chamber design and back cut and swirl polished valves for improved flow. Retains the stock valve angle, pushrod length and valve cover bolt pattern for use with factory components and off the shelf accessories. Larger reinforced rocker bosses for improved strength at high RPM and Heli-Coil® threaded inserts in the intake manifold bolt holes for added strength as well as a 3/4" deck throughout the head also promotes stiffness and durability. This cylinder head is machined to accept both distributor or coil pack ignition.
- Cylinder Head Specifications:
- Combustion chamber volume: 55cc
- Intake runner volume: 144cc
- Exhaust runner volume: 77cc
- Intake valve diameter: 1.91"
- Exhaust valve diameter: 1.50"
- Valve stem diameter: 5/16"
- Valve guides: Manganese bronze
- Deck thickness: .750"
- Valve spring diameter: 1.26"
- Valve spring maximum lift: .540"
- Rocker stud: N/A
- Guideplate: N/A
- Pushrod diameter: N/A
- Valve angle: 10° (stock)
- Exhaust port location: Stock (1991-98)
- Spark plug fitment: 14mm x 3/4 reach, gasket seat
FITMENT: This Performer cylinder head is designed as a bolt-on performance upgrade for 1987-2006 Jeeps with a 4.0L inline six-cylinder engine. To optimize airflow, this cylinder head is designed with a 1991-2006 4.0L intake port location and 1991-98 4.0L exhaust port size. As a result, 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.
EMISSIONS: This cylinder head is 50-state emission legal for 4.0L engines when used with factory Fuel Injection calibration and components (E.O. Number D-215-94). Pending 50-state emission legal for 4.2L engines when used with a Mopar Fuel Injection Conversion Kit (E.O. Number D-265-21).
| JEEP/AMC FITMENT GUIDE | ||
| Model Year | Intake Manifold | Exhaust Manifold |
| 1999-2006 | OEM | MUST use aftermarket exhaust header |
| 1991-1998 | MUST use 1991-2006 OEM intake | OEM or aftermarket exhaust header |
| 1987-1990 | MUST use 1991-2006 OEM intake | MUST use aftermarket exhaust header |
| 1976-1990 (AMC 4.2L) | MUST use appropriate intake | MUST use appropriate exhaust |
| Bare (Single) | Complete (Single) | ||||
| Application | Dyno | Emissions | Satin | Satin | |
| Performer Jeep 4.0l Inline Six |  |
 |
50159 | 50169 | |
| Valve Lift | .100" | .200" | .300" | .400" | .500" | .600" | .700" |
| Intake | 66 | 123 | 179 | 221 | 241 | 237 | - |
| Exhaust | 63 | 103 | 127 | 144 | 151 | 155 | - |
PRODUCT EMISSIONS GUIDE
The following guide is designed to help you determine which Edelbrock components are legal for use on your vehicle.
50-State Legal
For Racing Use ONLY
For Use on Pre-Pollution Controlled Vehicles (PPCV)
Stock Replacement Part
Engine Swaps
Vehicle Fitments:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1987 - 1994 | Jeep | Cherokee | Base |
| 1991 - 1992 | Jeep | Cherokee | Briarwood |
| 1987 - 1988 | Jeep | Cherokee | Chief |
| 1996 - 2001 | Jeep | Cherokee | Classic |
| 1993 - 1997 | Jeep | Cherokee | Country |
| 1987 - 1992 | Jeep | Cherokee | Laredo |
| 1987 - 2001 | Jeep | Cherokee | Limited |
| 1987 - 1990 | Jeep | Cherokee | Pioneer |
| 1994 - 2001 | Jeep | Cherokee | SE |
| 1989 - 2001 | Jeep | Cherokee | Sport |
| 1987 - 1992 | Jeep | Comanche | Base, Pioneer |
| 1988 - 1992 | Jeep | Comanche | Eliminator |
| 1987 - 1988 | Jeep | Comanche | Laredo, Chief |
| 1998 | Jeep | Grand Cherokee | 5.9 Limited |
| 1993 | Jeep | Grand Cherokee | Base |
| 1993 - 2004 | Jeep | Grand Cherokee | Laredo, Limited, SE |
| 1995 - 1997 | Jeep | Grand Cherokee | Orvis |
| 2002 - 2004 | Jeep | Grand Cherokee | Overland |
| 2004 | Jeep | Grand Cherokee | Special Edition |
| 2002 | Jeep | Grand Cherokee | Sport |
| 1997 - 1998 | Jeep | Grand Cherokee | TSi |
| 1987 | Jeep | Wagoneer | Base |
| 1987 - 1990 | Jeep | Wagoneer | Limited |
| 2001 | Jeep | Wrangler | 60 Aniversario |
| 2006 | Jeep | Wrangler | 65th Anniversary Edition, X 65 Aniversario |
| 1991 - 1997 | Jeep | Wrangler | Base |
| 1991 - 1992 | Jeep | Wrangler | Islander |
| 1995 | Jeep | Wrangler | Rio Grande |
| 2003 - 2006 | Jeep | Wrangler | Rubicon |
| 1991 - 1994 | Jeep | Wrangler | S, Renegade |
| 1991 - 2004 | Jeep | Wrangler | Sahara |
| 1994 - 2006 | Jeep | Wrangler | SE |
| 1997 - 2006 | Jeep | Wrangler | Sport |
| 2004 - 2006 | Jeep | Wrangler | Unlimited |
| 2005 - 2006 | Jeep | Wrangler | Unlimited Rubicon |
| 2002 - 2006 | Jeep | Wrangler | X |
| 2003 | Jeep | Wrangler | X AT |