i have a 2005 raptor 660 that is complely stock and im looking to get some more power out of it and i was woundering what would be the best exhaust to put on?

 

If you don't mind it being loud, Curtis Sparks is the way to go. You can go to sparksracing.com and get one for $560. And they sell the dynojet jet kits and add bigger pilot jets which is what they recommend. I just put one on mine and all my riding buddies are jealous.