What's up everybody. I'm new to the site and new to the SR20DE. I previously owned a 97 Altima (www.speedvizion.com). The thing that attracted me most 96 200sx SE-R was the limitless possibilities of the SR20DE. My first order of business (after I lower the car) will be exhaust. I've been shopping around and was wondering, is there a comparable difference between a custom 2 1/4 piping with a universal "performance" muffler and catback system such as greddy or HKS. What are the + and - of both? Also I've heard someone refer to the B-pipe made by courtesy. What is this and what does it do? Thanks for your help. And excellent site by the way.