Redline Emissions Redline Emissions Products, is a brand created by Diesel Emissions Service (DES) to cover the DPF needs in the light, medium and heavy duty diesel market. DES started operations in 2006 and has been serving the heavy duty truck market since 1978. DES was established to help California businesses get their trucks compliant and meet or exceed the strict CARB and EPA emissions regulations for their vehicles. In 2016, DES launched Redline Emissions Products to meet the growing needs of the light, medium and heavy-duty emissions industry.