Turner Performance Products spark arrestor end cap creates an easy and economical way to convert your stock muffler into a USFS approved spark arrestor muffler. USFS approved spark arrestor end cap. Cost effective option versus replacing the whole silencer. Designed to offer maximum performance; in testing, it was found that no power was lost from the stock end cap. The EE Screen type spark arrestor makes maintenance very easy by simply removing two bolts, the screen can be removed for replacement or servicing. Screen can be removed while riding on a closed course location.