my exhaust starting at the resonator is hanging about 2-3 inches below the rest of my car...how can i raise it up again?

 

bring it to a muffler shop.

 

you can do it yourself....the problem is with the flange on the cat. Put your car on ramps, loosen the exhaust to cat bolts, then put a jack where its hanging low and jack it up to a little higher than where you want it to be sitting (you will notice the flange on the cat pivot to CCW around the cat because the flange is not welded on...) and then tighten the flange bolts after the flange was pivoted a little bit. Then release the jack and your all set. The exhaust should sink maybe 1 inch and settle normally