I was wondering what is the stock HP of a 2004 Raptor 660, and how much of a gain do you get from things like jetting, pipe, intake, etc. compared to the price each thing costs(roughly)

Mike.

 

stock raptor is in the 30's Pipe filter and jetted properly u can look to be mid 40's u can get a power kit for like 600 bucks which is a pipe a jet kit and a filter kit Power Package..... Id highly reccomend getting this done.. its the best bang for the buck

 

Stock HP for a Rappy is 33-35 (depending if you have a california model or not). The best bang for your buck would be a slip on exhaust which range anywhere from 250-350 and will give you about 7 HP give er take one. If you wanted to spend another $200 on a header pipe to accompany that slip on than your looking at another 1 or 2 HP. If you got a K&N filter and took the lid off and jetted everything properly you're lookin at another 2-3 HP increase. All in all you'll gain about 10+ HP from all those mods. I recommend getting all these if you plan on doing any mods at all, it'll make the bike run how it was made to. Any more will cost you an arm and a leg and will only make it less reliable very fast. Good luck.