Ok, at the risk of sounding completly retarded I've got a question. I'm interested in starting pattern flying and am looking into getting a pattern plane. (not a 100% sure what yet) But I've noticed the exhaust set up is completly different on most pattern planes (headers and can) then normal planes. Where do I shop for these and what's the difference? Are these only for certain engines or can you mount them to anything? Let the bashing (and hopefully answers) begin...

-orange