What are the options for the SL. I heard that the Greddy system will not work on the SL. Does anyone know why?

Any thoughts on the hi flow cats and mufflers that you can find on ebay?

 

why would it not work ? sounds kinda odd, i see swa is selling them. call them up and see what they say ??
http://store.yahoo.com/southwestauto...necasp2ex.html

 

I'm not sure why it wouldn't work. There was a set on ebay last week and I emailed the guy asking him if he knew becasue the auction said for SE only. He said it wouldn't work.
What do you think about the systems on ebay.