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Edelbrock Performer Cylinder Head Upgrade for 4.2L and 4.0L Engines
Edelbrock Performer Cylinder Head Upgrade for 4.2L and 4.0L Engines

Edelbrock Performer Cylinder Head Upgrade for 4.2L and 4.0L Engines

Your Price: $1,787.95
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Part Number:50169

The Edelbrock #50169 Performer Cylinder Head is designed as a bolt-on performance upgrade for 4.2L and 4.0L 6-cylinder engines.

This head features better flowing intake / exhaust ports along with a modern combustion chamber design and back cut and swirl polished valves for improved flow.  It also retains the stock valve angle, pushrod length and valve cover bolt pattern for use with factory components and off the shelf accessories. The larger reinforced rocker bosses allow for improved strength at high RPM’s and the Heli-Coil threaded inserts in the intake manifold bolt holes give added strength.  The 3/4" deck throughout the head also promotes stiffness and durability.  

This cylinder head is machined to accept both stock & aftermarket distributors or coil pack ignitions.  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.

Designed for use with a Flat Tappet camshaft.  Horsepower range is 200-300 HP with this head.

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).  

It is Pending 50-state emission legal for 4.2L engines when used with a Mopar Fuel Injection Conversion Kit (E.O. Number D-265-21), such as the California Emissions Legal Howell Fuel Injection Kit AMC 6 Cylinder.

Recommended spark plugs: Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.

Recommended gasket for 4.0L: Edelbrock #7348 or Fel-Pro #26211PT.

Guide Plates are NOT included.


  • Combustion Chamber Volume: 55 cc
  • Deck Height: 9.435 in
  • Deck Thickness: 0.750 in
  • Intake Valve Diameter: 1.91 in
  • Exhaust Valve Diameter: 1.50 in
  • Intake Runner Volume: 144 cc
  • Material: Aluminum
  • Push Rod Diameter: 0.312 in
  • Valve Angle: 10 deg
  • Valve Spring Diameter: 1.26 in
  • Valve Spring Maximum Lift: 0.540 in
  • Valve Stem Diameter: 0.3125 in

If using roller rockers, you will have to add a spacer to the valve cover to clear.

Designed, cast, machined and assembled in the USA!

**Note: Dyno Chart was with a stock 4.0L block (not a 4.2L block).  Results will vary depending on block, crankshaft, camshaft, etc.

  • Fits:All with 4.2L 6-Cylinder Engine
  • 35.8lbs LIGHTER than a stock cast-iron head!
  • Head comes fully assembled and ready to bolt on!!
  • Installation Instructions are available HERE!
  • Made in the USA

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