Anyone using , or have an opinion on the Pypes SS exhaust

I've got a Pypes system (without the tails installed) with Race Pro muffs. Sounds healthy at idle and nasty when you really get on it. I adapted it to Schumacher headers: http://70duster440.com/exhaust.html

[ame="http://www.youtube.com/watch?v=BUi1Gk_NSm8"]YouTube - Preston Herrick's 1970 Big Block Plymouth Duster Exhaust[/ame]

[ame="http://www.youtube.com/watch?v=6I7__wnQ9Rk"]YouTube - Preston Herrick's 1970 Big Block Plymouth Duster - Street[/ame]