I will leave everything else in stock, so i don't know if the gt500s would sound same on my car. Is the stock midpipe same as yours?I have GT500's with longtubes and Hpipe and I dont know where people say they are quiet? If you idle its quiet, but when you mash it it sounds like a racecar, and im not exaggerating, my opinion and ive heard both, if you like deep muscle car rumble and loud go with gt500's.....thats just me, and everyone comments on how nice it sounds and how loud it is.....!