Keep your 2017-2019 GM 6.6L L5P Duramax running clean, efficient, and emissions-compliant with high-quality diesel exhaust aftertreatment components from Norcal Diesel Performance. Whether you're replacing a worn sensor, servicing your DPF system, or restoring proper aftertreatment operation, you'll find trusted solutions from industry-respected brands like PureDPF, Dynomite Diesel, and Alliant Power. PureDPF is known for its direct-fit DPF components, service kits, and exhaust system parts designed to help maintain proper filtration and exhaust flow, while Dynomite Diesel offers proven DPF cleaning products that can help support system performance and longevity. For dependable OE-style fuel system and aftertreatment components, Alliant Power delivers quality-engineered replacement parts trusted by diesel owners and technicians alike. From DPF ring gaskets and EGT sensors to aftertreatment fuel injectors, factory service kits, and replacement DPF assemblies, these components help your L5P maintain proper regeneration cycles, improve overall reliability, reduce the risk of emissions-related issues, and keep your truck performing at its best whether it's used for towing, hauling, or daily driving.