I just added the Lethal O/R H to my GT500 mufflers...It's pretty loud!
I plan on doing the same thing but I have the Roush ABs
Current 2012 Lexus RX350 & 2011 Ford Escape XLT
2012 Grabber Blue, GT Prem, Sold 8/20/2012
2014 Ingot Silver Focus ST ST2 W/ Moonroof and Blue Recaro Inserts: Ordered 05/22/2014