I'm deciding on what thickness to go with for a custom true dual exhaust set-up on my07 g coupe, so i kinda need some advice, what will be the best sounding thickness i don't want a high pitch raspiness sound, i will be running 2.5 inch with 2 vibrant performance resonators and oem cats.

Thanks guys for the help

 

I would go with 16 ga. 18 ga is .048 20 ga .036. I think 20 is too thin and will not hold up and last. As far as sound if material thickness changes the sound 16 is .060. I hope it helps you somewhat in your decision

 

What about oval tubing?