i just bought a pair of magnaflow 3.5 in exhaust tips, and im planning on having them welded on in place of the factory tips. but heres the problem, they look pretty long. theyre about 20 inches long where the 2.5 in inlet begins...is this too long, will they be able to be welded in. if not could my muffler shop modify them to fit...? im worried, please help