The site performancepeddler.com is giving great deals on Magnaflow exhaust kits right now using coupon code 'audipipes' at checkout. I am not affiliated with these guys, but i did order myself a kit and have gotten a shipping notification already.
For reference, the kit I needed retails for over $1200 and their final price was $586 shipped. Some other kits are under $400 shipped.
Your 5 digit kit number can be gotten from magnaflow.com