Cheap exhaust:

Custom mandrel bent piping of your size. No bigger than 2.5" i'd go with 2.25", and a muffler
one muffler which people don't look at for imports are by flowmasters. they look stock as ****, and are available in black if you want. my friend just got one. sorta deep, but pretty quiet.

muffler was only $80.
piping will be like $150.