Well, got it in and all I can say is WOW! Took me 1.5 hours start to finish. It went in and lined up with minimal effort, especially the tails, they almost fell into the right spot! I probably spent more time scraping the stickers off of the parts then actually installing them.
The sound is awesome. I have BBK Lt's and BBK off- road H, and it has a nice throaty idle, and screams when you get on it. There's only a tiny amount of drone if you hold it right at 1800 RPM then it's gone by 1900, where it's actually fairly quiet, but it only takes the tiniest amount of throttle before she's howling again. Definately beats Flows hands down.
Overall, I would give PYPES a 9.5 out of 10. The workmanship and sound is awsome. I would not hesitate to buy from them again, and definatly reccomend the cat back.