Need a new end cap for your 4" Straight series slip-ons? Bassani offers replacement end caps for replacement purposes in case you might have lost one down the road, got scratched, or any other reason you may need a new cap, they have you covered. Sold individually Billet Aluminum Polished billet end cap with 1" lip for Bassani 4" Megaphone Slip-On Mufflers for Touring Models 450-018 or 441-108.