will a dg xccelerator silencer increase horsepower in my raptor and is it worth it. Do i have to jet?

 

There are much better options, actually almost all of the options are better. I say almost because I've seen a cherry bomb put on a raptor...

 

I agree, you can do much better than the DG. As far as re-jetting goes, if all you do is put a slip-on exhaust on and no other mods you MAY not have to re-jet. But to get the most out of that new pipe you should take the airbox lid off and put a high flow air filter on. Then you will definately have to re-jet.