Honestly i have rode warriors with an hmf, yoshi, pro circuit, and white bro's. They are all great performing pipes and all sound good, some louder than others. They each add power in different areas, so it all matters where you want the power. If you want lots of low end power - mid range hmf would be your best choice. Mid to topend yoshi or white bro's. Im not just suggesting for you to get an hmf because i have one but I wouldnt trade it for any other pipe. Lots of low end great for wheelies and tight trails.