Sinister Diesel

The oil system in your engine is crucial to the trucks performance and life. Keeping your oil clean is what it all comes down to and this 6.7L Cumm...

Even on freshly rebuilt, or brand new engines, the coolant is usually contaminated with microscopic particles including casting sand leftover from ...

Quicken your truck'turbo spool-up and throttle response with this 6.7L Cummins cold air intake from Sinister Diesel. It'been designed, engineered, ...

Sinister Diesel intakes are designed, engineered and fabricated in-house to provide industry leading performance and durability. All of our intakes...