We are proud to offer our complete line of products for your diesel truck performance. We offer a complete packages to get the most out of your diesel truck. Some of are products are high performance/race only and are intended for off road use only. According to the EPA Clean Air Act, they are illegal for use on any Federal, State, or Local public highways and illegal use is punishable by the penalties enacted by the mentioned laws. We do not condone illegal use of these products, and an Environmental and Liability waiver must be signed before any DPF-Delete products will ship. Additionally, the off road products are strictly forbidden and will not be sold in California.