Our selection of Heads and Valve train components are strong and reliable replacements for the OEM parts. Whether you upgrade your cylinder heads that offer increased durability and thickness, you can depend on our selection to give you the performance your 6.7L Cummins demands! Be sure to check out our full line of Engine Upgrades to ensure maximum reliability and performance from your 5.9L Cummins! Ram Cummins Fitments: 2004, 2005, 2006, 2007 Ram 5.9L Cummins.Submodel Fitments: Tradesman, Laramie, Laramie Longhorn, Big Horn, Limited, Lone Star, Power Wagon.Some exceptions apply, please see individual product pages for specific fitments.