I put the Q (or QQ) version behind my hi-flow cat, because it was recommended by Solo; seems the regular exhaust may drone in that setup. It sounded great, even after I melted the cat and put the stock one back on. I've only had a few occasions when someone else drove it, while I stood aside, but it sounds like the roadster it is.
Deep, steel/sand, loaded except standard radio and no smoker's; #08974
Mods: Kappasphere CAI, Clear Image Shorty Header, second horn, visor decals, mudflaps, tonneau cover, brake light flasher, trailer hitch, 'lil Chromies, trunk monkey, retune, DDMWorks backbone, GMPP Suspension, wood grain dash, Solo Quiet cat-back exhaust, deleted:Solo high-flow cat