Fleece Performance

Fleece Performance Engineering is a premier manufacturer of high-performance diesel engine components focused on improving reliability, efficiency, and power. Specializing in fuel system upgrades, turbocharger components, sensors, wiring solutions, and cooling system enhancements, Fleece products are engineered to solve common diesel platform failures while supporting performance demands. Their precision-designed components are widely trusted in Duramax, Cummins, and Power Stroke applications across street, towing, and competition use.