[RKDinOKC]

My GTS would not pass sitting at the side of the track idling. I replaced the cats with an x-pipe, but did add sport cats which do the cat thing without the restriction. The killer is I removed the rear muffler. However, I do have the original muffler that would for sure pass. With the rear muffler I can't hear the exhaust even when going under a bridge getting on the throttle with my head out the window straining to hear it.

Oh yeah, the static noise test is done at 75% throttle.

When I had my 944 Turbo Lindsey Racing initially fitted it with a FlowMaster muffler after the rebuild, no cat and a graduated exhaust that went from 3 in at the down pipe to 4 inch at the muffler. The sound level measured 126db at 10ft. Within 3 days driving around observing break-in rpm and throttle recommendations I got pulled over by a cop that heard it from 2 blocks away. Changed to a MagnaFlow the same size and it reduced the sound level to 92db at 10ft.