Dragon- I'm considering the XR-1 for my Z06. I heard one on an FRC during the Big Sur cruise, and it sounded awesome!!!
I have some concern about the resonance, but after speaking with Borla, I think it could be addressed if there was a problem.
I'd like to see someone dyno a Z06 with the XR-1 and see if they made any extra power. I haven't seen enough results with other exhausts to believe that there is a consistent power gain. I was looking at the PRTs last year, but then Mako reported he actually LOST power after he installed them!
Sounds like you and I are headed in the same direction for our cars. I'm looking to add headers, cam and heads as soon as cash permits! /phpBB/images/smiles/icon_wink.gif
We should get together sometime and compare notes, I live in San Mateo and work in Hayward. You can check out my nitrous install if you like! /phpBB/images/smiles/icon_biggrin.gif