Advice: exhaust is too quiet

If you can exchange the back street that you have and the backs that I have (competition), maybe we could exchange them, although I do not know how much would cost the shipment to USA and Europe.

Apart from that this http://www.mustang6g.com/forums/showthread.php?t=84886 is my experience with cat back competition

Sell the streets to someone who's willing to give up their "Man-Card" and buy the Competitions. I almost made the same mistake and bought the wrong ones too, like you. I wrote an article on here with more detail. Just remember, you can always quiet a loud system with your foot and gears, but you can't make a system louder with the same techniques. My 2 cents.

Buzz out

I have the magnaflow street and love it. Sounds awesome from behind, but I'm old and don't like drone.