BROCK, is the best all around pipe for my personal use. Pretty much most of the top of the line full systems exhaust are close in performance, a good turner could make anyone of the top five pipes perform over another pipe with a custom map (DYNO), just depends on their experience. Its really all about what you're wanting. Make a list and narrow it down to what you really want it to have.........loud pipes, carbon fiber, bling status, a double or a single side exhaust,road ,or drag racing etc.
High mounts mufflers are probably what you want to consider for scraping you knees, hitting the twisties hard. A short cut pipe like a Brock MEGAPHONE or a MUZZY pipe for Drag racing. I like to do a smidge of everything listed above on the street, nothing serious but you get my point. I have a TITATiUM Gen III street Smart exhuast by Brock DAVIDSON. What really make his producsts stand out from the rest is his customer service. I just purchased my a high polish Titatium full exhaust system last yr. During the previous 6 yrs I was lookig(dragging my feet) I never read or heard anyone say or print anything negatively about Brock personally or his product, that right there says a lot. Along with that he's a biker that use to race motorcycles, and now produces his own product with extensive research and testing (inhouse and on the track). He also offers an online forum for Q/A, member correspondence, etc. And a
special member area for his customers, And recieve discounts on all other products he sells.
You don't have to worry (emailing, pm'ing or even phone calling everyone you know that has a map) about what map will work best with your setup like I see with others that have purchased other brands. He has thorougly researched ,tested (in house and on the track) and put together the best MAPs for his systems for various speed enhancement you could possibly want to add on to your bike. Usually he respond's with'n 24 but its usually lesser.
If you're not a serious racer or trying to make money at it, it probably doesn't really matter what slip on's or system you get, just make sure its suited for your type of bike or you'll probably notice some pwr loss.
Brocks maps used with his systems will get you as close as a good turner can do, for free if you decide to go with a brock.
Pay now or pay more l8tr.