Sinister Diesel Coolant Filtration System for 2001–2010 Chevy/GMC 6.6L Duramax
Help keep casting sand, metal shavings and other debris out of your Duramax’s coolant. The Sinister Diesel Coolant Filtration System uses a genuine WIX filter to filter a small portion of the coolant while the engine runs, helping reduce debris-related wear and blockage in cooling-system components.
With a no-drill mounting bracket and an easy-to-replace spin-on filter, this bypass system makes coolant filtration part of your truck’s regular maintenance routine.
Built for filtration and easy servicing
- Bypass filtration: Filters small amounts of coolant while the engine is running.
- Billet aluminum filter block: CNC-machined from 6061 aluminum and anodized in Sinister Blue.
- No-drill mounting: The supplied bracket attaches to factory holes.
- Silicone hoses with pre-assembled fittings: Designed to simplify connections. The manufacturer states the connections are tested at twice the recommended radiator-cap pressure.
- Serviceable filter: Unscrews for replacement.
- Filter-block layout: Two threaded inlet ports and one outlet port.
What’s in the kit
- Genuine WIX coolant filter
- Filter block
- Mounting bracket
- Silicone hoses and fittings
- Installation hardware
Vehicle fitment
For 2001–2010 Chevrolet and GMC 2500 and 3500 models equipped with the 6.6L Duramax LB7, LLY, LBZ or LMM engine. Confirm your model year and engine code before ordering.
Installation and maintenance
Manufacturer-estimated installation time is approximately 2 hours; actual time varies with experience.
The supplied manufacturer guidance recommends replacing the first filter after 500 miles, then replacing the second and third filters after 3,000 miles each. After those three changes, replace the filter annually.
Recommended tools: 9/16-inch and 13/16-inch wrenches, 8 mm socket, 3/8-inch 12-point socket or 5/16-inch combination wrench, large adjustable wrench, standard screwdriver, utility knife and diagonal cutters.
Part number: SD-COOLFIL-6.6-01-W