Proper heat management from the cooling system is crucial on modified engines when you want trouble-free and reliable performance. The factory Duramax water pump is known to slip under load and can serious problems and serious repair bills on modified high-horsepower applications. This updated design is a drop-in replacement for the factory water pump and uses precision TIG welds to secure both the impeller and pump gear to the shaft. If your 2001-2005 Duramax powered truck is running a tuner, a bigger turbo, or bigger injectors, or if it’s just time for routine maintenance, get peace of mind with the Sinister Diesel Welded Duramax Water Pump.
TIG welded on both Impeller and Gear for high strength and slip-free operation
Drop-in replacement for LB7/LLY factory water pump
Meets or exceeds OEM specifications
(1) Sinister Diesel “Welded” Water Pump
(1) Thermostat Gasket