Performance Peddler has protege magnaflow cat-back systems for sale for $313.43 shipped. Just enter the code EBAYROCKS in the discount code field to get the price. This is the cheapest I could find them out there.

You can use this discount code for other models and anything else on their site as well. Pretty sweet deal.

 

Damn .. that really IS a sweet deal!! I've never heard of the vendor, but that's a damn good price. Good find!