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Are you looking for the best performance brands in the diesel performance industry? Well if you are you have definitely come to the right place/ Diesel Ops has the top manufacturers like Duramax Tuner, PPEI, Fleece Performance, ATS Diesel,BD, Sinister Diesel, MBRP Exhaust, Diamond Eye Exhausts and many more. Are you getting ready to install your new tuner or egr delete kit and need the instructions? Well we have all of the installation guides on our product listings that make installing any part from just about any brand a cinch. Looking for a DPF Delete/ Race Pipe for your race application? Well we have delete tuners as well with custom tuning from all of the top brands.