Headquartered in California, Sinister Diesel is a massive innovator and highly respected manufacturer within the diesel performance aftermarket. Instantly recognizable by their signature "Sinister Blue" powder coating, they engineer parts specifically designed to eliminate factory bottlenecks, lower exhaust gas temperatures, and drastically improve the reliability of Cummins, Powerstroke, and Duramax engines. From high-flow cold air intakes and mandrel-bent exhaust systems to heavy-duty coolant filtration kits, Sinister Diesel provides the bulletproof upgrades required for heavy towing and high-horsepower diesel builds.

• Signature "Sinister Blue": High-quality, vibrant blue powder coating that protects components from under-hood heat while providing a stunning aesthetic.

• Vital Coolant Filtration: Highly popular bypass filtration systems that remove casting sand and microscopic debris, preventing catastrophic water pump and EGR failure.

• Optimized Airflow Solutions: High-efficiency cold air intakes and intake elbows engineered to provide maximum dense air to the turbocharger.

• Engineered for Reliability: Focused entirely on addressing factory weak points to ensure your diesel truck runs stronger, cooler, and longer.

Protect your expensive diesel engine and unlock its true towing potential with the premium, heavily engineered upgrades from Sinister Diesel.