In April of 2023 Weaver's Diesel Performance installed an exhaust brake on my 1998 Dodge Ram pick-up, 3500 dually w/ the Cummins 12 valve motor. They also adjusted/tuned my P7100 injection pump to get a modest horse power boost. It all works great. The exhaust brake works just as I'd hoped and the added horse power is noticeable without creating any overheating concerns. James the owner, has years of diesel experience and knowledge. I'm glad I found him. Him and his employees were professional and good to work with. Very satisfied customer.