Maintain or repair the cooling system in your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax with the selection of Thermostats & Housings. Stock replacement and aftermarket billet housing are available for many application depending on preference and budget. Stock, higher, and lower temperature thermostats are available to match the needs of your cooling system. XDP has top manufactures such as Dorman, Mishimoto, and many more to choose from.