Refined from four decades of on-track competition, the Stainless 2-into-1 Upsweep looks and acts the part, hand TIG-welded of high grade (ASTM A269). 304 stainless steel with a brushed �works� finish and engineered to maximize torque and power out of the Milwaukee-Eight powerplant. High Grade 304 Stainless Steel (ASTM A269). Oversized 2-into-1 Merge Collector. Megaphone Muffler. Race Inspired Heat Shield. Fits Forward & Mid Control Models*. Fits: 2018 TO 2020 FLDE/ FXBB/ FXFB/ FXLR/ FLSL Softail Models.