Ok, I put my 4" SST exhaust on, turbo back and it's fantastic. I spent plenty of time fitting stuff and checking for clearances. However, I have noticed some blk soot around some of the slits where you use a Clamp. It's been on for about 6 months. From turbo to the Xfer case we're good. it's the rear section of the exhaust that has very very minor leaks. I called the tech line when installing and they said to position the clamps over the center of the slits in the pipe joints. thats what I did... Should I move them back? Am I the only guy with this? Exactly how are the clamps supposed to be positioned in relationship to the slits?