Trying to do some upgrades and it seems that everyone get hmf. Why is that. Is anyone running the hmf quitecore in theirs? Is it still loud. My other bike has yoshi, I'd like to have something that doesn't hurt your ears when you rev on it. Ebay has the torc and the hmf, the torc is more expensive and it multi-colored, and the hmf looks like solid stainless or chrome. Any help appriciated