Description
Part#: ALL-11303
Manufacturer: AMC
Year Range: 71-74
Engine Size: 3.8/4.2L - 232/258ci - L6
Description: 71-74 AMC 3.8L/4.2L - 232ci/258ci - L6 - Bolt Down Rocker 809 Cylinder Head
Introducing our 71-74 AMC 3.8L/4.2L - 232ci/258ci - L6 - Bolt Down Rocker 809 Cylinder Head, a premium upgrade that exceeds OEM specifications. Crafted by AMC, a trusted manufacturer, this cylinder head is designed to elevate your engine's performance.
This meticulously cylinder head is compatible with a year range spanning from 1971 to 1974 and fits engines with sizes of 3.8L/4.2L - 232/258ci - L6. Part number ALL-11303 ensures a perfect fit for your vehicle.
Our expertly refurbished cylinder head guarantees reliability and durability, providing you with enhanced engine performance and peace of mind.
If you're in search of more cylinder head options, explore our Cylinder Heads collection to find the perfect match for your needs. Don't hesitate to reach out to our knowledgeable support team with any questions or concerns. If assistance is required or you have questions, please contact our expert support team through our contact form, call 866-766-9955, or email us at sales@alliedmotorparts.com. We're here to help you every step of the way. Check out our blog section to learn about cylinder heads.
Learn more about Mopar Cylinder Heads.
This Cylinder Head has a core charge of $100.00 included in the cost. This charge is FULLY REFUNDED upon return. We will include a prepaid label for the return freight.
The cylinder head included in this listing will fit the vehicles listed below. It is also important to review / confirm the fitment notes above to assure the vehicle specifics of the head are correct for your application. If you have any question that this may not be the correct head for your vehicle or need help in locating the correct head, please contact us via phone or email prior to making a purchase.
Compatible Vehicle
| MAKE | MODEL | YEAR | ENGINE |
|---|---|---|---|
| American Motors | Gremlin | 1971-1974 | 4.2L 258Cu. In. l6 GAS |
| American Motors | Gremlin | 1971-1974 | 3.8L 232Cu. In. l6 GAS |
| American Motors | Hornet | 1971-1974 | 4.2L 258Cu. In. l6 GAS |
| American Motors | Hornet | 1971-1974 | 3.8L 232Cu. In. l6 GAS |
| American Motors | Javelin | 1971-1974 | 4.2L 4228CC 258Cu. In. l6 GAS OHV |
| American Motors | Javelin | 1971-1974 | 3.8L 3802CC 232Cu. In. l6 GAS OHV |
| American Motors | Matador | 1971-1974 | 4.2L 258Cu. In. l6 GAS |
| American Motors | Matador | 1971-1974 | 3.8L 232Cu. In. l6 GAS |
| Jeep | CJ5 | 1972-1974 | 3.8L 232Cu. In. l6 GAS |
| Jeep | CJ6 | 1972-1974 | 3.8L 232Cu. In. l6 GAS |
| Jeep | DJ5 | 1972-1974 | 3.8L 232Cu. In. l6 GAS |
| Jeep | J-2500 | 1971 | 3.8L 232Cu. In. l6 GAS |
| Jeep | J-2600 | 1971 | 3.8L 3802CC 232Cu. In. l6 GAS OHV |
| Jeep | Jeepster | 1972-1973 | 3.8L 232Cu. In. l6 GAS |
| Jeep | Wagoneer | 1971 | 3.8L 232Cu. In. l6 GAS |
Not sure this is your casting? Call 866-766-9955 with your casting number and your vehicle's year, make and engine, and we'll confirm it before you buy.
Process & Warranty
Cylinder Head Rebuilding Process
1. Initial Inspection: As a unit comes to our shop, we give it an initial inspection to determine whether there is any reason the head should not proceed to rebuilding. This quickly catches problems such as cracks, casting damage and other conditions that would halt the process for that casting.
2. Teardown: The cylinder head is fully disassembled, which reveals other areas of potential damage to the casting. The parts and the head are separated and go through different cleaning processes.
3. Cleaning: Cast iron heads are cleaned in a thermal cleaning system — baked at 600° to reduce grease and oil to ash, then put through a steel-shot machine for a brilliant finish. Aluminum heads are baked at a lower temperature or put through a high-pressure wash, then glass-beaded.
4. Head Inspection: After cleaning, heads are pressure tested or Magnafluxed to find any cracks. All bolt holes, valve guides, valve seats and other areas are inspected for broken bolts, broken taps, cracked guides and other impairments. Straightness and cam bore wear are also checked.
5. Machining: All heads have guides installed to meet OE conditions and are resurfaced to far exceed factory specifications for surface finish. A three-angle valve job achieves valve seat runout under .001". Valves are ground for a perfect seal between valve and seat.
6. Assembly: New OE-style valve guide seals are installed. Springs are tested for proper seat pressure. Valve seat sealing is vacuum-checked for an airtight fit. Lifters are bled and rebuilt for zero lash after startup. Cams are polished and clearances are checked twice to meet OE oil clearances.
7. Final Inspection: Every head is visually inspected — surface finish, lash, bolt holes and all other areas — to ensure a quality cylinder head.
Questions about our cylinder head services? Call 1-866-766-9955.
Warranty — 12 months from purchase
Match the head before installation. We will not warranty an incorrectly installed head. Call us immediately with any questions or concerns about your purchase.
First 3 months:
- Repair or replacement of the cylinder head.
- Gasket set supplied for reinstallation.
- Labor calculated from book time at $25.00 per hour, up to a maximum of 10 hours.
- Replacement of fluids and filters.
Remaining 9 months:
- Repair or replacement of the cylinder head.
- Gasket set supplied for reinstallation.
- Replacement of fluids and filters.
- No labor is covered.
Warranty is void if:
- The head was improperly installed.
- The head was overheated (heat tab melted or missing).
- The head received insufficient oiling.
- The cooling system operated improperly.
Warranty returns must be sent to Allied Motor Parts uncleaned and fully assembled — any disassembly voids the warranty — and must be accompanied by proof of purchase. There is no warranty on threaded bolt holes after installation.
This warranty is in lieu of any other warranty, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose.
Quality Assurance
Here’s why our cylinder heads stand out:
Thorough Inspection: Every head undergoes a complete teardown, cleaning, and detailed inspection for cracks and imperfections.
Advanced Cleaning: Thermal cleaning for cast iron and high-pressure washing for aluminum ensures a brilliant finish.
Precision Machining: CBN resurfacing, triple-angle valve cuts, and guide installations exceed OEM specifications.
Rigorous Testing: Vacuum tests, tension checks, and pressure tests guarantee performance and durability.
High-Quality Components: New seals, plugs, and rebuilt lifters ensure optimal functionality.
Final Assurance: Each head is inspected, stamped, and stored in a climate-controlled environment.
Wide Availability: Over 2,000 cylinder heads for all makes and models, ready for repair or exchange.