Click on:
http://mapsp.com/content/TechnicalPaper ... nstall.pdf
to learn everything that is involved. These cans weigh less than 5 lbs each. This whole setup is superior to the Sebrings in HP and sound. View the dyno run on our web site. The Sebrings on another bike were about 1.5 HP lower, cost more, and have a less massive sound than these. I have heard them both.
Some people have cut the pipe further from the stock can at a straighter angle (this lessens the amount of bending involved), but that changes the distance from the start of the exhaust-can in relation to the exhaust valves. Unless you have an eddy current dyno and the ability to change your FI map, I would advise against doing that. Also, the power will be affected. How much? Don't know... Could be better, could be worse.
We approach these mods as you would any R&D project, measure twice, cut once, and set your baseline data before begining. It works for us!
Sincerely,