Looking at Milltek Sport Exhaust cat back.

Immediate need for tuning as well?

Estimated price for exhaust and tuning services in Chicago area?

Opinions?

You don't need to tune anything to run an exhaust.

You're looking for a 2.5 inch cat back with an X-pipe. Jeremy is correct, no tune is necessary to run an exhaust, BUT, once you have a 2.5 inch cat back with X-pipe, you should consider JHMotorsports tuning. The tune is about $600 but is specifically designed to work with a free flowing exhaust and frees up about 30-40 ponies. Any reputable exhaust shop should be able to get you what you need for under $600.

Also, while you're in there tearing stuff up, you need to "piggy pipe" your downpipes, that is, remove the pre-cat (the first one off the exhaust manifold).