damn you and your header!!! lol im jelly... and also i have run abour 6 or 7 different exhaust set ups on the 1.8...
first i removed the muffler , was impressed, never had a car sound that decent by just cutting the muffler off..
then i added a glasspack out the side.. only sounded good at certain rpms
those are what u wanna do if u want it just a little louder
then i removed the res and put in another glasspack, a bit louder, especially in the car, still sounded like ass only at certain rpms good
then removed the 2nd cat, a pinch louder
then removed glasspack res very loud inside car, deff sounded sexy but again only when i was gettin it
then did my custom exhaust, 2.25" piping, 25" glasspack res, and a knock off fart car out the back, crush bent.. now im looking to mess with the 1st cat, or get a header.. but my current set up is deffinatly very nice, the 1.8 sounds a lot meaner than it is with a good set up, i got a sound vid too... unfortunatly only with my current set up, but here it is...
Sonic 1.8 custom exhaust - YouTube
i think this is more what your goin for tho.. i think this is fallen angel...
2012 Chevy Sonic 1.8L - New Custom Exhaust System - YouTube