Found this company that will make a 2.25,2.5 or 3" singe or dual exhaust and makes downpipes as well...anyone using a 3" exhaust? I had one on my cobalt SS with a header but lost tq on the 2.0 till we upped the boost, on the 2.2 dunno...anyone?
Custom Exhausts for Cavalier
Pete            ***RIP John Lingenfelter***                                 
2002 Flame Yellow Sunfire GT B+M shifted 5 Spd
Just looking for mods and prey 
 
 
Im running 3" on my cav with RD Fabs' 2" primary header.  No before dynos but I made 219whp with a 3.1" pulley and GM crapflash.  As for the butt dyno, I didn't notice any loss down low but did get a nice gain up top.

its an old concept. time for something new to take the reigns. - Z yaaaa