2001-2004 GM 6.6L Duramax Replacement & Performance Cylinder Heads

Fits: 2001-2004 GM 6.6L Duramax LB7 ProMaxx Performance has the answer for the epidemic of cracked GM Duramax 6.6L cylinder heads. Designed by ProMaxx from an OE casting, ProMaxx improved the casting strength with greater thickness in all crack prone areas. Developed as a direct bolt-on re..

Features: Direct Replacement Diamond Honed Guides Unshrouded Valves High Strength Alloy, Heat Treated iron based valve guides Premium valve seat inserts made from a true Nickel Based Non-Magnetic material Multi angle valve job New valve springs The Industrial Injection LB7 Dur..

Features: Direct Replacement Diamond Honed Guides Unshrouded Valves High Strength Alloy, Heat Treated iron based valve guides Premium valve seat inserts made from a true Nickel Based Non-Magnetic material Multi angle valve job New valve springs The Industrial Injection LB7 Dur..

ALL NEW! Freedom Series cylinder heads for the LB7 6.6L Duramax now with a cupless injector bore - save time and money with no more injector cups to install, leak, or worry about. Each cylinder head is assembled from a new casting in our state-of-the-art Freedom Racing Engine shop and is guaranteed ..

The XDP LB7 Injector Cup & O-Ring Set XD410 helps hold the fuel injector in the cylinder head of your 2001-2004 GM 6.6L Duramax LB7. The factory injector cups are known to seize in the head, leak, and even corrode. When this happens it can often cause over pressurization of the cooling system le..

Replace the worn valve stem seals inside your 2001-2010 GM 6.6L Duramax when you purchase the MAHLE SS45974 Valve Stem Seal Kit. Designed as a direct factory replacement, the MAHLE SS45974 Valve Stem Seal Kit is made to OE specifications and is constructed from OEM quality materials.F..

A small amount of this red sealant goes at the bottom of each injector cup to ensure proper sealing.   To see the proper location of the sealant see image below. Merchant Automotive part number: 10014..

This is ONE cup, 8 are needed for all to be replaced. Replace damaged or pitted injector cups Does not come with O-ring seals Use red Locktite to seal to head Part number: 97188463..

Replace damaged injector cup o-rings to ensure no coolant contamination into the engine oil.  Damaged seals will allow cross contamination. This is for a pack of 16 o-rings. Merchant Automotive part number: 10033..

This is ONE cup, 8 are needed for all to be replaced.Replace damaged or pitted injector cups Comes with 2 O-rings Use red Locktite to seal to head→Click Here To Check Fitment← OE#: 97188463, 94051259 Dorman Part number: 904-120..

Valve Guide Seal, LB7/LLY/LBZ/LMM/LML, 2001+ DuramaxDURAMAX Valve Guide Seal-32 per engine-16 per head Part number: 13939..

GM 97779578R LB7 Duramax Diesel Cylinder Head 01-04..

Replace damaged injector cup o-rings to ensure no coolant contamination into the engine oil.  Damaged seals will allow cross contamination. This is for two (2) o-rings only. Merchant Automotive part number: 10306..