sawzall the canister off.
heat to bend and re-route or buy a 90 degree exhaust tip/elbow.
searching yields that yes, it helps. especially when the rear window is down.
Dude, you can't heat and bend a 2.5" exhaust pipe 90 deg......
Muffler shop can do a tailpipe. Also magnaflow cat back is side exit. Rotten egg smell is your cats- different problem.