01-05 Duramax LB7 LLY HSP T-Stat Housing with Return Line Turbo 0L Powerstroke’s cylinder heads from

0L Powerstroke’s cylinder heads from lifting due to higher combustion pressures

the HOT transmission oil has to be COOLED to stay on track

7L Cummins

For all 94-03 Powerstroke 7

01-05 Duramax LB7 LLY HSP T-Stat Housing with Return Line Turbo 0L Powerstroke’s cylinder heads fromNormal build time 2 3 weeks You should be running the forward facing thremostat housing kit, with coolant return if you have a stock turbo charger in the valley. This coolant return has a pervision to allow coolant to return from the turbo charger Many of the Chevy Duramax coolant lines are routed in a way that makes it difficult to upgrade turbochargers, or other performance accessories. The HSP Diesel team has developed a solution for many of those