Billet Thermostat Housing Kit W/Coolant Return for 01-05 Chevrolet/GMC Duramax LB7/LLY Illusion Purple HSP Diesel " ARP POWER *When physically changing ring and

*When physically changing ring and pinion gears in the late model GM trucks

consider inspecting and replacing the other key components including tie rods

They get trashed by mud

this kit comes with Rough Country's Lifetime Replacement Guarantee

IP68 Waterproof Rating

Billet Thermostat Housing Kit W/Coolant Return for 01-05 Chevrolet/GMC Duramax LB7/LLY Illusion Purple HSP Diesel " ARP POWER *When physically changing ring andHSP Billet Thermostat Housing Kit W Coolant return for 2001 2005 Chevrolet GMC Duramax LB7 LLY. You should be running the forward facing thermostat housing kit, with coolant return if you have a stock turbocharger in the valley. This coolant return has a provision to allow coolant to return from the turbocharger Many of the Chevy Duramax coolant lines are routed in a way that makes it difficult to upgrade turbochargers or other performance