What is the original exhaust system on 2006 v6 4.0? I bought the convertible from someone who put a cat-back on it and it is way too loud for my old ears. The hum goes right to the center of my brain... migraine within two miles. I want to put the "like original" back on but I can't seem to find any info. Everything seems to be about getting duel upgrades but a v6 can never be made to sound like a v8 in MHO. Please help me quiet this thing down!