Ceramic coatings inside and outside of the head pipe, mid pipe, and tail pipe reduce engine temperature and extend engine life. Ceramic also resists flaking, bluing and rust. CNC billet aluminum end cap complete with a USFS approved screen-type spark arrestor. Sealed inlet and cap produces a leakless seal (industry first). Stainless steel pop rivets. 6 month's manufacturers warranty. Designed for maximum performance at responsible noise levels. Features Quiet core silencer. Sold with Silent Sport muffler packing Pop rivets area all stainless steel blind end so they can't leak or rust