They sound perfect to me
And that's all that matters. As far as the tips, it would be logical that if you went down to a 2" tip it would change the sound. So you would think going to a 4" would add something to it. I still have my stock 3 inch. Someone who's done that swap should be along soon then we'll both know. Haha.
08 GT 5spd
Spectra CAI, Comp Cam Detroit Rockers, Kooks headers w/catted H-pipe, Revolution Automotive dyno tuned, FB430 race mufflers, 3.55s, JLT catch can, BMR Lca's and relo brackets. Prothane motor mounts and sway bar bushings.
20% tint, smoked markers and tail lights w/sequentials. Clear front signal covers, series 3 chin spoiler.