Just put original 40 Flowmasters on stock 2000 gt today,sounds great! Was leary because put Delta 40's on Vette few years ago and resonance was unbearable!! Mostly due to it being a Vette , known for bad resonance. Just got car 2 weeks ago and really liking it. $200 installed seemed like good deal too!

 

I have flows weldedonto my car, and I could hardly tell there was a difference. When I put on the Bassani X though, man, she sounded so good.

 

which Flow's you have ? Mine are probably 30-40-% louder than my OEM mufflers.Everything else is stock.