I personally don't like the other heavy metal dusts that would result.... I figured you already left that idea behind, though...
Somebody else here might know of something, but in my shopping for exhaust parts for my project I have run into no such part for the G8.
'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
"If you want to criticize someone else's work, be sure that your own is in order first."