Fits 2017 and 2018 Streetglide, Roadglide, Ultra, and Road King. Vance & Hines 4″ chrome slip-on mufflers for Harley-Davidson motorcycles combine the classic look of round slip-ons with a distinctive twin slash end treatment The Twin Slash Slip-Ons offer an all-mechanical straight through louvered baffle for generating power gains and producing the unmistakable throaty rumble of Vance & Hines mufflers The Twin Slash Round Slip-Ons are sold in pairs and are the best value for upgrading the sound and performance of your touring bike Vance & Hines uses a full-coverage heat shield to blue-proof these chrome slip-ons Vance & Hines Twin Slash Slip-Ons are made in the USA Purchase of the Vance & Hines Fuelpak or Fuelpak FP3 Fuel Management System is recommended when installing Twin Slash Round Slip-Ons on motorcycles with EFI Signature twin slash end treatment Optional quiet insert availableNote: Will fit Freewheeler and Tri Glide Models