I have seen the J-pipes constructed and installed for under $300. The solo axle back system with j-pipes and 4 1/2 tips are $500. The full cat back system is $900. There are deals every now and then. Best bet is to call Steve Mariano and ask. He is also on this site as goingsolo I believe. Again I went with the full cat back since when I added up all the pieces it was more cost effective. Go to their web site for all the details.
www.solo-performance.com