This is a common problem with all Cummins engines that are turned up and this is the best solution. This kit will also help with the higher temperature at the back of the engine where #5 & 6 cylinders suffer. Most commonly, people confuse poor flow to the back of the head with excessive heat. 99% of the time it is an issue with temperature and not air flow.
We have tested this kit on many of our own and customer trucks for several years and this is a proven must have!!!! 100% made in the U. Billet aluminum thermostat housing adapter black anodized. Secondary O-ring seal (No gasket required). 8AN Braided black hose and fittings installed on both ends. Adjustable brass water bypass valve from 50-100 psi. The item "2007 present Cummins Turbo Diesel 6.7L Billet cooling system water bypass kit" is in sale since Monday, July 31, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Cooling Systems\Other". The seller is "action*" and is located in Stuart, Florida.This item can be shipped worldwide.