I am buying an exhaust for my Grizzly 660 and I needed to know if anyone had trouble rejetting there exhaust for the HMF pipe. The place I am buying the exhaust kit from says that dynojet instructions are not accurate and that I could end up burning a whole in my pipe. Any input would be great thanks. Also, has anyone tried out the supertrapp exhaust? If I don't find the answers I want about the HMF I am going to fall back on that one. All advice is welcome.

 

Contact highlifter.com.

 

That is who was telling me there is a problem with the jet kit and the hmf but i ended up ordering the supertrapp. Thanks for the input