I need help, what pipe should i use for my YFZ, i want something that will give me the most power, but i dont want to spend alot of money. Dubach racing makes a exhaust kit for 310 and adds 7 horespower to my quad. Anyother suggestions?

 

sparks, yoshi.
I hear the FMF is nice..Im not sure what it is called, Factory 4 mybe?