I have recently been looking for either test pipes, HFC, or y-pipe that gives me a few more horses. I have heard the aam's with test pipes and its awesome.
CIMG1583.mp4 video by bigj_11_null - Photobucket
Just a little too loud for my everyday driver..
Now, I am in love with the short tails. I have actually had people tell me that they think its a GT-R before they see the car. I love that. I think the simplicity of the "bolt on" concept is great. The only downside is going 50 MPH up a hill. Drone like a mutha'...and the fact that the gains are so minimal, if any.
I would like a better flowing system, and like someone said before... If the price is right, i think its great.
I purchased the short tails for $415 after shipping over a year ago. Obviously prices have gone down a little since I bought mine, but even for $415- thats a hundred bucks or so over what it would cost for custom pipes. For $550, you can purchase a complete full exhaust with gains over +15hp. The only downfall--none of the exhausts online sound like the short tails.
If i was able to get gains and the same sound with less drone..i'd be sold. Sorry, I vented.