Keep your 6.6L LLY Duramax running cool and reliable with quality cooling system components from Norcal Diesel Performance. The LLY Duramax is known for its power and towing capability, but heavy loads and hot conditions can put serious stress on its cooling system. Upgrading your radiator, coolant hose kit, fan clutch, or water pump can make a big difference in performance and engine longevity. Whether you’re tackling tough towing jobs or daily driving, our selection of high-performance parts from trusted brands like PPE Diesel, Mishimoto, Fleece Performance, Sinister Diesel, and more will keep your LLY running at the ideal temperature. From complete water pump replacement kits to heavy-duty radiators built to handle extreme heat, you’ll find everything you need to enhance cooling efficiency and protect your Duramax investment.
