Diesel Emissions Service

Since its inception, Diesel Emissions Service (DES) has been built on a foundation of excellence, personal service, and family values. With Steve Hoke, who grew up in the family business, at the helm, DES continues the legacy of prioritizing customer connections, quality workmanship, and unwavering commitment to excellence. The entire DES team shares a dedication to providing the diesel emissions industry with personalized service, in-depth product knowledge, and high-quality parts. 

DES began its operations in 2006 as the emissions division of North State Truck Equipment, Inc., a company that has served the heavy-duty truck market since 1978. It was established to assist California businesses in meeting and surpassing the stringent CARB (California Air Resources Board) and EPA (Environmental Protection Agency) emissions regulations imposed on diesel trucks. Over the years, DES has sold and installed more than 15,000 emission control devices, earning a reputation as an industry leader in diesel emissions on the West Coast, as well as across the United States and Canada.

As part of their comprehensive offerings, DES manufactures DPF (diesel particulate filter) equipment and accessories, distributes popular industry DPFs and accessories, and provides cleaning, servicing, and retrofitting for DPF filters. In 2014, DES introduced Filtertherm®, their brand of DPF cleaning equipment, which was developed as a response to outdated cleaning technology. In 2016, they launched Redline Emissions Products®, a brand that addresses the DPF equipment needs in the light, medium, and heavy-duty diesel markets. Their extensive product range includes DPFs, gaskets, clamps, weld bungs, CACs (charge air coolers), sensors, brackets, guards, and custom mounting kits. DES boasts an AMADA stamping press and a complete fabrication facility, along with a UL-certified electrical control panel shop.

With one of the largest replacement OEM filter inventories in North America, DES has expanded its distribution to Canada and Australia. They have established locations across the West Coast and are actively growing their nationwide Redline Dealer Network for aftertreatment parts and cleaning equipment. This strategic network expansion ensures convenient access to their products and services for customers nationwide.

Diesel Emissions Service (DES) is dedicated to being your trusted partner in all diesel emissions-related needs. With their extensive experience, wide-ranging product offerings, and commitment to exceptional service, DES continues to serve as a leading authority in the diesel emissions industry.