Industrial Injection Reman Heads 11-16 GM 6.6L Duramax LML
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When it comes to critical engine components , quality and reliability matter. Whether you're performing a complete Duramax engine rebuild or upgrading worn components, choosing high-quality parts for your engine is essential. The Industrial Injection Remanufactured LML Duramax Cylinder Heads provide a dependable solution designed to restore strength, performance, and durability to your 6.6L LML Duramax engine .
These remanufactured Duramax cylinder heads are an excellent starting point for anyone rebuilding or repairing their diesel engine. Each cylinder head undergoes a detailed remanufacturing process to ensure it meets or exceeds OEM specifications for fitment, reliability, and performance .
SOLD AS A PAIR.
Precision Cleaning & Inspection Process
Each head is first jet washed in a high-pressure spray cabinet to remove oil, debris, and contaminants. The head is then glass beaded to eliminate carbon buildup and restore a clean surface.
After cleaning, the head undergoes a detailed inspection process including magnaflux testing (for cast iron heads) or pressure testing to check for cracks and structural integrity. Finally, technicians perform a visual inspection for defects that could affect performance or reliability.
New high-strength alloy, heat-treated iron valve guides are installed in every remanufactured Duramax head. These guides are heat treated to Rockwell 22 “C” scale, delivering exceptional durability and wear resistance that exceeds many factory materials, including bronze guides.
Each valve guide features a precision spiral groove designed to retain oil and improve valve lubrication during engine operation, helping extend engine life.
Upgraded Heat-Treated Valve Guides
These Duramax heads receive new high-strength alloy valve guides that are heat treated to Rockwell 22 “C” scale for maximum wear resistance.
Diamond Honed Valve Guide Precision
Unlike traditional reaming, the valve guides are precision honed using diamond abrasives to achieve exact tolerances. This process guarantees consistent guide diameter and geometry, superior surface finish, and precise valve alignment.
Multi-Angle Valve Job for Improved Airflow
Each remanufactured head receives a precision multi-angle valve job using a Serdi 100 guide and seat machine .
This advanced machining process:
• Simulates the true valve stem alignment
• Ensures a perfect valve-to-seat seal
• Helps maximize airflow in and out of the cylinder head
Improved airflow can support better engine efficiency and combustion performance .
Precision Machined Cylinder Head Surface
The cylinder head deck surface is machined using CBN or diamond tooling on a Berco milling machine .
This allows precise control of the surface finish to ensure compatibility with various head gasket types, including:
• MLS (Multi-Layer Steel) head gaskets
• Performance gasket materials
A properly machined surface helps ensure reliable sealing and long-term engine durability .
Final Assembly
After machining is complete, each LML Duramax remanufactured cylinder head is:
• Jet washed again for final cleaning
• Thoroughly dried
• Carefully assembled with new valve seals and valve springs
The result is a high-quality stock replacement Duramax cylinder head designed for dependable performance.
When it comes to critical engine components , quality and reliability matter. Whether you're performing a complete Duramax engine rebuild or upgrading worn components, choosing high-quality parts for your engine is essential. The Industrial Injection Remanufactured LML Duramax Cylinder Heads provide a dependable solution designed to restore strength, performance, and durability to your 6.6L LML Duramax engine .
These remanufactured Duramax cylinder heads are an excellent starting point for anyone rebuilding or repairing their diesel engine. Each cylinder head undergoes a detailed remanufacturing process to ensure it meets or exceeds OEM specifications for fitment, reliability, and performance .
SOLD AS A PAIR.
Precision Cleaning & Inspection Process
Each head is first jet washed in a high-pressure spray cabinet to remove oil, debris, and contaminants. The head is then glass beaded to eliminate carbon buildup and restore a clean surface.
After cleaning, the head undergoes a detailed inspection process including magnaflux testing (for cast iron heads) or pressure testing to check for cracks and structural integrity. Finally, technicians perform a visual inspection for defects that could affect performance or reliability.
New high-strength alloy, heat-treated iron valve guides are installed in every remanufactured Duramax head. These guides are heat treated to Rockwell 22 “C” scale, delivering exceptional durability and wear resistance that exceeds many factory materials, including bronze guides.
Each valve guide features a precision spiral groove designed to retain oil and improve valve lubrication during engine operation, helping extend engine life.
Upgraded Heat-Treated Valve Guides
These Duramax heads receive new high-strength alloy valve guides that are heat treated to Rockwell 22 “C” scale for maximum wear resistance.
Diamond Honed Valve Guide Precision
Unlike traditional reaming, the valve guides are precision honed using diamond abrasives to achieve exact tolerances. This process guarantees consistent guide diameter and geometry, superior surface finish, and precise valve alignment.
Multi-Angle Valve Job for Improved Airflow
Each remanufactured head receives a precision multi-angle valve job using a Serdi 100 guide and seat machine .
This advanced machining process:
• Simulates the true valve stem alignment
• Ensures a perfect valve-to-seat seal
• Helps maximize airflow in and out of the cylinder head
Improved airflow can support better engine efficiency and combustion performance .
Precision Machined Cylinder Head Surface
The cylinder head deck surface is machined using CBN or diamond tooling on a Berco milling machine .
This allows precise control of the surface finish to ensure compatibility with various head gasket types, including:
• MLS (Multi-Layer Steel) head gaskets
• Performance gasket materials
A properly machined surface helps ensure reliable sealing and long-term engine durability .
Final Assembly
After machining is complete, each LML Duramax remanufactured cylinder head is:
• Jet washed again for final cleaning
• Thoroughly dried
• Carefully assembled with new valve seals and valve springs
The result is a high-quality stock replacement Duramax cylinder head designed for dependable performance.
Diesel Power Products directs warranty claims to the respective manufacturer; coverage and duration depend on that manufacturer and product. Its one-year manufacturer-defect warranty applies only to products manufactured by Power Products Unlimited Inc., not all products it sells. Manufacturer inspection is required; DPP does not pay inspection/return shipping or labor.
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Diesel Power Products warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Professional installation is recommended.
- Return eligibility
- Diesel Power Products states a 30-day window from receipt for eligible new, uninstalled, unopened and complete items in original packaging, with prior approval/RMA. Custom tuners and specified opened tools are excluded. Customer pays return shipping; original outbound shipping, including initially free shipping, is deducted. No standard restocking percentage is stated for ordinary approved returns. Based on what Diesel Power Products offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- Diesel Power Products
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Diesel Power Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.