New Here ,, about 1000 miles on my ZR2 Just Got the Awe exhaust and had it installed.. live in the city going from block to block only getting up to about 25-30mph before the next block and stop sign when slowing back down at about 20 mph sounds like it shuts off or closes then at about 15-10mph right before i stop it sounds like it pops back open its really weird and annoying,, does anyone else experience this ? also i have the clamps on the way AWE says and still feels like a little air comes out around the clamps