Delco is not only famous for its heavy duty starters and alternators. It is also a manufacturer and supplier of solenoids, switches, and relays designed for fuel and throttle applications. At Robert's & Son, you can find a stellar selection of Delco relays, switches, and solenoids. These products are available as brand new and can be used in a variety of diesel engines. Robert's & Son has been in the business for nearly five decades and we cover a wide range of fuel and throttle needs by carrying products that offer unmatched performance and reliability. Browse through our well-stocked inventory today and source for quality Delco relays, switches, and solenoids with ease.