Flexible Payments
BUY NOW, PAY LATER
Split your purchase into easy monthly payments

The Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2001-2005 LB7/LLY Duramax replaces the OEM upper radiator hose that normally crosses over the driver side valve cover as well as the coolant return pipe. By changing the coolant routing to an upwards and forward layout from the thermostat, this kit improves access to driver side fuel system components, adds room for larger aftermarket turbochargers, and updates engine bay appearance. Compatible with Single and Dual CP3 Pump setups. Finished in your choice of custom powder coat colors.
We offer free shipping on orders over $100. Standard shipping takes 3-5 business days.
Expedited shipping options are available at checkout.

Flexible Payments
Split your purchase into easy monthly payments

Expert Service
Schedule your professional installation or repair