Thanks for the info. I just got off the phone with Rob and he said the exact same thing. I was only worried because my '01 and '04 never sounded like that when I replaced them with Banks exhaust...
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Thanks for the info. I just got off the phone with Rob and he said the exact same thing. I was only worried because my '01 and '04 never sounded like that when I replaced them with Banks exhaust...
Just replaced exhaust from down pipe back with MBRP 4" on a 2008 LMM. Installed a 50hp tow/economy tune (DPF Delete) and have a very strange continuous hissing sound. Once, when I started the truck...