yes big time lover of the GTO here, obsessed of course lol. what i want to know is i been looking at the pics of the magnaflow exhaust kit they have for the 05 GTO, and that they put on with the sports package at the dealer. i seen pics where the sports package exhaust looks like a real magna flow but other then the tips saying it i'm not sure. does anyone know for sure that maybe this sports package exhaust is really a magnaflow model?

From the 05 GTO Brochure...

"... the GTO Sport Appearance Package includes a front fascia with a new lower valance and recessed grille insert, rocker extensions, a custom high spoiler, a rear fascia extension, and deep-sounding mufflers with dual/dual chrome exhaust outlets.

I've seen pictures where the tips read magnaflow. So I'm not quite sure if these tips and the mufflers are magnaflows or stock GM pieces. Regardless the only thing coming in the SAP is the mufflers and tips, not the entire exhaust. :)

I believe it is a catback system...

check it out this is a pic of the OEM and sports package muffler this muffler looks very closely to that of the magnaflow cat back they sell, so i think its real

http://community.webshots.com/photo/250722771/251301084KmywRz

I know that my exhaust sounded a lot more aggressive after the SAP was installed. I'm adding the Kooks long tube headers next week. We'll see how it sounds then.