Hi guys! I recently installed a full MBRP cat back system with the side exit tail pipes. I like the sound of it at idle and when I rev, but when I accelerate hard it makes a loud whushing sound. It is almost like a bad exhaust leak, but I have checked all the clamps and they are all tight. Any ideas on what this could be? Has anyone else with MBRP had this issue? Thanks for everyones help in advance, always greatly appreciated! Btw, it is a 2011 1500 5.3.