I've had an SLP LM installed since last summer (took it to a shop to have it installed), it's on a 94 LT1. Over time the left outlet (the one with the hangar of sorts keeping it up) has dropped lower. It's not horribly off-center but enough that it's beginning to drive me insane. Do I need to bring it back to the shop that installed it in the first place to get it tightened up which, since I moved, is now 2 hrs away, or is something I could do without too much difficulty myself - and how would I go about something like this?

 

The clamp holding the "L" pipe is probably loose. You can find it where the stock muffler used to sit. You might have to jack up the car to reach it. Just rotate the "L" pipe (the one that goes from the driver side to the passenger side tip) until the tip is where you want it, then tighten the clamp.