How much power will a HMF pipe add to my 05 Vinson? I love the low end power of the Vinny but wish I could get a little bit more top end.

What else can I do to add power?

 

The HMF will most likely do nothing for your top end, but low to mid range you will see a pretty good gain, if you add a high flow filter and rejet the carb. I love everything about mine, even though its on a different quad, I have never seen anyone complain about the HMF, other then some think its to loud. I bought the Utility series and a quiet core/ spark arrestor. I only use the arrestor when on National property. The sound of the pipe with out it is just awesome IMO.