Replace the stock plastic or cast aluminum plugs for perfect thread engagement. Most kits are lighter than stock. Easily removed or installed with a allen wrench. Available in Annodized Red, Blue or Black.
"I bought this set, when the oem plug heads snapped off. I searched for a while and finally found a set in black. These are great, but don't forget to buy new "o" rings. These are especially nice if you want a strong plug that won't break and if you are like me and don't want to put a bunch of different colored products on your bike that make fake horsepower these are for you."