Replaces stock, plastic manifold Must have for big bore engines Includes new rubber seal High-Flow, adds 3-5 hp Easy to install For closed course competition use only. Not intended for street use. Legal in CA only for racing vehicles which may never be used, or registered or licensed for use, upon a highway. Not legal for sale or use nationwide on any federal pollution controlled motor vehicle under the clean air act. Fitments: 2021 Harley-Davidson Road Glide Custom FLTRX - - 2021 Harley-Davidson Road King EFI FLHR - - 2021 Harley-Davidson Street Glide EFI FLHX - - 2021 Harley-Davidson CVO Street Glide FLHXSE - - 2021 Harley-Davidson Electra Glide Standard EFI FLHTI - - 2020-2021 Harley-Davidson Road Glide Limited FLTRK - - 2020-2021 Harley-Davidson CVO Tri Glide FLHTCUTGSE - - 2020-2021 Harley-Davidson CVO Road Glide Custom FLTRXSE - - 2020 Harley-Davidson Road King EFI FLHR - - 2020 Harley-Davidson CVO Street Glide FLHXSE - - 2020 Harley-Davidson Street Glide EFI FLHX - - 2020 Harley-Davidson Electra Glide Standard EFI FLHTI - - 2019-2020 Harley-Davidson Electra Glide Police FLHTPI - - 2019 Harley-Davidson FXDR 114 - - 2019 Harley-Davidson Electra Glide Standard EFI FLHTI - - 2018-2019 Harley-Davidson Softail Low Rider FXLR - - 2018-2019 Harley-Davidson Softail Street Bob FXBB - - 2018-2019 Harley-Davidson Softail Breakout 114 FXBRS - - 2018-2019 Harley-Davidson Softail Breakout FXBR - - 2018-2019 Harley-Davidson Softail Heritage Classic FLHC - - 2018-2019 Harley-Davidson Softail Slim FLSL - - 2018-2019 Harley-Davidson Softail Fat Bob 114 FXFBS - - 2018-2019 Harley-Davidson Softail Fat Bob FXFB - - 2018-2019 Harley-Davidson Softail Fat Boy 114 FLFBS - - 2018-2019 Harley-Davidson Softail Heritage Classic 114 FLHCS - - 2018-2019 Harley-Davidson Softail Deluxe FLDE - - 2018-2019 Harley-Davidson Softail Sport Glide FLSB - - 2018-2019 Harley-Davidson Softail Fat Boy FLFB - - 2018-2019 Harley-Davidson CVO Road Glide Custom FLTRXSE - - 2017-2021 Harley-Davidson Road Glide Special FLTRXS - - 2017-2021 Harley-Davidson Electra Glide Ultra Limited FLHTK - - 2017-2021 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG - - 2017-2021 Harley-Davidson Road King Special FLHRXS - - 2017-2021 Harley-Davidson Street Glide Special FLHXS - - 2017-2021 Harley-Davidson CVO Electra Glide Ultra Limited FLHTKSE - - 2017-2021 Harley-Davidson Freewheeler FLRT - - 2017-2020 Harley-Davidson Road Glide Custom FLTRX - - 2017-2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL - - 2017-2019 Harley-Davidson Street Glide EFI FLHX - - 2017-2019 Harley-Davidson Road King EFI FLHR - - 2017-2019 Harley-Davidson Road Glide Ultra FLTRU - - 2017-2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI - - 2017-2019 Harley-Davidson CVO Street Glide FLHXSE - - 2017-2018 Harley-Davidson Electra Glide Police FLHTPI - -