ProMAXX Performance

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..

DX Diesel Xtreme is our newest heads on the market. It is taking the diesel market to places it has never been before.  An aluminum version of what has always been a cast iron cylinder head. They’re now lighter and stronger than it’s cast iron brother and has been tested for the past ..

Fits: 2004.5-2005 GM 6.6 Duramax LLYThe ProMaxx Bare Aluminum Cylinder Head allows you to custom build the cylinder heads you need for you 2004.5-2005 GM 6.6L Duramax LLY. ProMaxx Performance's cylinder head is the answer to Duramax's crack-prone cylinder heads. This cylinder head was designed ..

Fits: 2004.5-2005 GM 6.6 Duramax LLYThe ProMaxx Aluminum Cylinder Head is a fully assembled replacement cylinder head for your 2004.5-2005 GM 6.6L Duramax LLY. This cylinder head from ProMaxx Performance is the remedy to Duramax's crack-prone cylinder heads. This replacement cylinder head was design..

The ProMaxx FOR852NB Bare Replacement Cylinder Head is a high quality replacement for your 2008-2010 Ford 6.4L Powerstroke. Built with thicker castings in crack prone areas, these heads undergo extensive testing and quality control to ensure that you receive the best product possible for your 6..

The ProMaxx FOR852N Replacement Cylinder Head is a high quality replacement for your 2008-2010 Ford 6.4L Powerstroke. Built with thicker castings in crack prone areas, the ProMaxx Cylinder Heads undergo extensive testing and quality control to ensure that you receive the best products possible ..

Fits: 1989-1998  3.9L 4BT CumminsThis ProMaxx Replacement Cylinder Head is a direct-Fit replacement for the damaged or cracked cylinder head in your 3.9L 4BT powered vehicle. This cylinder head is a new casting and comes ready to put in truck with all new valves, valve seals, springs, retainers..

ProMaxx Performance designed/developed this cylinder head from the GM 6.5 diesel casting. This is a cast iron direct bolt on replacement for your 6.5 diesel. This head has Strait intake bolt holes in the cylinder head. This head in mostly found in GM 6.5 Diesel Trucks. Standard heads typically us..

Ships in 2-3 Business Days!!1988-1998 Dodge Ram 5.9L Cummins 6B 12 Valve Diesel Fully Loaded Cylinder HeadBy: Promaxx PerformanceDue to some quality inconsistencies we HIGHLY recommend that at a bare minimum you have the surface of these heads checked for flatness and the valve job checked before i..

WILL TAKE 1 to 2 weeks TO SHIPShipping options only refer to orders within the lower 48 states. If outside of that, please call for a quote Made by ProMaxx Thicker castings in crack prone areas New head complete No core charge Note: Although this is a new head you should always check for fl..

ProMaxx Performance developed/designed this cylinder head from the OE casting. This is a direct bolt on cast iron cylinder head to replace your factory casting. Part number: FOR850-1..

OUT OF STOCK!!! The ProMaxx 1998.5-2002 Dodge 5.9L Cummins Replacement Cylinder Head is a direct replacement for your casting #627. ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, ..

ProMaxx Performance developed/designed this cylinder head from the OE casting. This is a direct bolt on cast iron cylinder head to replace your factory casting. Part number: FOR851-1..