I have purchased almost every upgrade possible through ss diesel. I have a 1998 3500 dually. I started with the 4 inch right off the get go and noticed a nice increase in flow along with the cold air intake. I have replaced my injectors to marine... ...read more From: Matt F.
Back again and you were right again Walt! I knew that my turbo was not spooling up very well and you gave me the probable causes. You hit it on the head with the Vacuum pump. After installing your new vacuum pump the Turbo is spooling up like never... ...read more From: Alan M.