2-Stroke Spark Arrestor End Cap. 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 there was no power loss 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.