Judging by your name, i am assuming you have a new Supersport 550 fan. I would just drive it as-is and save the money. I'm not aware of any aftermarket pipes for that engine. If there are any, you're lucky, but it's better to modify a liquid cooled engine than a fan cooled. Aftermarket reeds might help out a bit, but that's up to you. IMO, the best thing to do to that sled would be a clutch kit and jetting if it seems to run rich.
For jetting guidlines use Polaris Guidelines and reduce Jet Spec. by 1 or 2 sizes.
Clutching -- pick up your phone and make some calls to Companys that deal in clutch kits. Hot TO Go,Earlandson,Heal Clicker, ect.
Yes aaen does make a pipe for your machine. It costs 399.95 canadien. It will give your machine 8 horsepower and save ten pounds. Epi also makes a clutch kit for your sled and it consists of a new helix,primary spring and secondary spring. That kit lists for 229.95 canadien. This kit will let you get the power to the ground. But remember you always sacrifice duribility for performance. And your warrenty will be voided with the use of these products.
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