Not for '23-'24 models with 121" VVT motors.
Features
- Aggressive pulling power with a “nasty” sound, the Reaper 521 grind will shine in 114” and larger cubic inch engines with added compression ratio
- Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range
- Stock throttle body produces an excellent powerband; use of a high-flow throttle body may increase peak power numbers
- A high-flow exhaust system and air cleaner is highly recommended for optimal performance
- Rpm range 2250-6250
- Made in the USA
- Cam specs measured in the engine on the lifter @ 0.050 using a 1.61 rocker arm ratio.
- Feuling recommends matching 521 cam with Race Series oiling system.
- Requires high lift springs.
- Heavy-duty one-piece pushrods are also highly recommended.
Specs
| Intake Lift | 0.518" |
| Model | Reaper |
| Product Name | Cam |
| Application | Exhaust |
| Intake Duration | 231° |
| Exhaust Close | 11.5° |
| Exhaust Lift at TDC | 0.125" |
| Exhaust Lobe Centerline | 110° |
| Grind | 521 Series |
| Intake Lobe Centerline | 98.5° |
| Riding Style | Street |
| Exhaust Lift | 0.521" |
| Intake Lift at TDC | 0.162" |
| Intake Close | 34° |
| Type | Chain |
| Exhaust Duration | 243° |
| Exhaust Open | 51.5° |
| Intake Open | 17° |
| Units | Each |
| Year | Make | Model |
|---|---|---|
| 2017 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2017 | Harley-Davidson | FLHR Road King |
| 2017 | Harley-Davidson | FLHRXS Road King Special |
| 2017 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic |
| 2017 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2017 | Harley-Davidson | FLHTK Ultra Limited |
| 2017 | Harley-Davidson | FLHTKL Ultra Limited Low |
| 2017 | Harley-Davidson | FLHTKSE CVO Limited |
| 2017 | Harley-Davidson | FLHX Street Glide |
| 2017 | Harley-Davidson | FLHXS Street Glide Special |
| 2017 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2017 | Harley-Davidson | FLRT Freewheeler |
| 2017 | Harley-Davidson | FLTRU Road Glide Ultra |
| 2017 | Harley-Davidson | FLTRX Road Glide |
| 2017 | Harley-Davidson | FLTRXS Road Glide Special |
| 2017 | Harley-Davidson | Road King Police FLHP |
| 2018 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2018 | Harley-Davidson | FLDE Deluxe 107 |
| 2018 | Harley-Davidson | FLFB Fat Boy 107 |
| 2018 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2018 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2018 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2018 | Harley-Davidson | FLHR Road King |
| 2018 | Harley-Davidson | FLHRXS Road King Special |
| 2018 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic |
| 2018 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2018 | Harley-Davidson | FLHTK Ultra Limited |
| 2018 | Harley-Davidson | FLHTKL Ultra Limited Low |
| 2018 | Harley-Davidson | FLHTKSE CVO Limited |
| 2018 | Harley-Davidson | FLHX Street Glide |
| 2018 | Harley-Davidson | FLHXS Street Glide Special |
| 2018 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2018 | Harley-Davidson | FLRT Freewheeler |
| 2018 | Harley-Davidson | FLSB Sport Glide 107 |
| 2018 | Harley-Davidson | FLSL Softail Slim 107 |
| 2018 | Harley-Davidson | FLTRU Road Glide Ultra |
| 2018 | Harley-Davidson | FLTRX Road Glide |
| 2018 | Harley-Davidson | FLTRXS Road Glide Special |
| 2018 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2018 | Harley-Davidson | FXBB Street Bob 107 |
| 2018 | Harley-Davidson | FXBR Breakout 107 |
| 2018 | Harley-Davidson | FXBRS Breakout 114 |
| 2018 | Harley-Davidson | FXFB Fat Bob 107 |
| 2018 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2018 | Harley-Davidson | FXLR Low Rider 107 |
| 2018 | Harley-Davidson | Road King Police FLHP |
| 2019 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2019 | Harley-Davidson | FLDE Deluxe 107 |
| 2019 | Harley-Davidson | FLFB Fat Boy 107 |
| 2019 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2019 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2019 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2019 | Harley-Davidson | FLHR Road King |
| 2019 | Harley-Davidson | FLHRXS Road King Special |
| 2019 | Harley-Davidson | FLHT Electra Glide Standard |
| 2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic |
| 2019 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2019 | Harley-Davidson | FLHTK Ultra Limited |
| 2019 | Harley-Davidson | FLHTKL Ultra Limited Low |
| 2019 | Harley-Davidson | FLHTKSE CVO Limited |
| 2019 | Harley-Davidson | FLHX Street Glide |
| 2019 | Harley-Davidson | FLHXS Street Glide Special |
| 2019 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2019 | Harley-Davidson | FLRT Freewheeler |
| 2019 | Harley-Davidson | FLSB Sport Glide 107 |
| 2019 | Harley-Davidson | FLSL Softail Slim 107 |
| 2019 | Harley-Davidson | FLTRU Road Glide Ultra |
| 2019 | Harley-Davidson | FLTRX Road Glide |
| 2019 | Harley-Davidson | FLTRXS Road Glide Special |
| 2019 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2019 | Harley-Davidson | FXBB Street Bob 107 |
| 2019 | Harley-Davidson | FXBR Breakout 107 |
| 2019 | Harley-Davidson | FXBRS Breakout 114 |
| 2019 | Harley-Davidson | FXDRS FXDR 114 |
| 2019 | Harley-Davidson | FXFB Fat Bob 107 |
| 2019 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2019 | Harley-Davidson | FXLR Low Rider 107 |
| 2019 | Harley-Davidson | Road King Police FLHP |
| 2020 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2020 | Harley-Davidson | FLDE Deluxe 107 |
| 2020 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2020 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2020 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2020 | Harley-Davidson | FLHR Road King |
| 2020 | Harley-Davidson | FLHRXS Road King Special |
| 2020 | Harley-Davidson | FLHT Electra Glide Standard |
| 2020 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2020 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide |
| 2020 | Harley-Davidson | FLHTK Ultra Limited |
| 2020 | Harley-Davidson | FLHTKSE CVO Limited |
| 2020 | Harley-Davidson | FLHX Street Glide |
| 2020 | Harley-Davidson | FLHXS Street Glide Special |
| 2020 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2020 | Harley-Davidson | FLRT Freewheeler |
| 2020 | Harley-Davidson | FLSB Sport Glide 107 |
| 2020 | Harley-Davidson | FLSL Softail Slim 107 |
| 2020 | Harley-Davidson | FLTRK Road Glide Limited |
| 2020 | Harley-Davidson | FLTRX Road Glide |
| 2020 | Harley-Davidson | FLTRXS Road Glide Special |
| 2020 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2020 | Harley-Davidson | FXBB Street Bob 107 |
| 2020 | Harley-Davidson | FXBRS Breakout 114 |
| 2020 | Harley-Davidson | FXDRS FXDR 114 |
| 2020 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2020 | Harley-Davidson | FXLR Low Rider 107 |
| 2020 | Harley-Davidson | FXLRS Low Rider S 114 |
| 2020 | Harley-Davidson | FXST Softail Standard 107 |
| 2020 | Harley-Davidson | Road King Police FLHP |
| 2021 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2021 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2021 | Harley-Davidson | FLH Electra Glide Revival |
| 2021 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2021 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2021 | Harley-Davidson | FLHR Road King |
| 2021 | Harley-Davidson | FLHRXS Road King Special |
| 2021 | Harley-Davidson | FLHT Electra Glide Standard |
| 2021 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2021 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide |
| 2021 | Harley-Davidson | FLHTK Ultra Limited |
| 2021 | Harley-Davidson | FLHTKSE CVO Limited |
| 2021 | Harley-Davidson | FLHX Street Glide |
| 2021 | Harley-Davidson | FLHXS Street Glide Special |
| 2021 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2021 | Harley-Davidson | FLRT Freewheeler |
| 2021 | Harley-Davidson | FLSB Sport Glide 107 |
| 2021 | Harley-Davidson | FLSL Softail Slim 107 |
| 2021 | Harley-Davidson | FLTRK Road Glide Limited |
| 2021 | Harley-Davidson | FLTRX Road Glide |
| 2021 | Harley-Davidson | FLTRXS Road Glide Special |
| 2021 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2021 | Harley-Davidson | FXBBS Street Bob 114 |
| 2021 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2021 | Harley-Davidson | FXLRS Low Rider S 114 |
| 2021 | Harley-Davidson | FXST Softail Standard 107 |
| 2021 | Harley-Davidson | Road King Police FLHP |
| 2022 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2022 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2022 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2022 | Harley-Davidson | FLHR Road King |
| 2022 | Harley-Davidson | FLHRXS Road King Special |
| 2022 | Harley-Davidson | FLHT Electra Glide Standard |
| 2022 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2022 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide |
| 2022 | Harley-Davidson | FLHTK Ultra Limited |
| 2022 | Harley-Davidson | FLHX Street Glide |
| 2022 | Harley-Davidson | FLHXS Street Glide Special |
| 2022 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2022 | Harley-Davidson | FLHXST Street Glide ST |
| 2022 | Harley-Davidson | FLRT Freewheeler |
| 2022 | Harley-Davidson | FLSB Sport Glide 107 |
| 2022 | Harley-Davidson | FLTRK Road Glide Limited |
| 2022 | Harley-Davidson | FLTRKSE CVO Road Glide Limited |
| 2022 | Harley-Davidson | FLTRX Road Glide |
| 2022 | Harley-Davidson | FLTRXS Road Glide Special |
| 2022 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2022 | Harley-Davidson | FLTRXST Road Glide ST |
| 2022 | Harley-Davidson | FXBBS Street Bob 114 |
| 2022 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2022 | Harley-Davidson | FXLRS Low Rider S 117 |
| 2022 | Harley-Davidson | FXLRST Low Rider ST 117 |
| 2022 | Harley-Davidson | FXRST Low Rider El Diablo 117 |
| 2022 | Harley-Davidson | FXST Softail Standard 107 |
| 2022 | Harley-Davidson | Road King Police FLHP |
| 2022 | Harley-Davidson | Softail Street Bob FXBB |
| 2023 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2023 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2023 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2023 | Harley-Davidson | FLHFB Electra Glide Highway King |
| 2023 | Harley-Davidson | FLHRXS Road King Special |
| 2023 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2023 | Harley-Davidson | FLHTK Ultra Limited |
| 2023 | Harley-Davidson | FLHX Street Glide |
| 2023 | Harley-Davidson | FLHXS Street Glide Special |
| 2023 | Harley-Davidson | FLHXST Street Glide ST |
| 2023 | Harley-Davidson | FLRT Freewheeler |
| 2023 | Harley-Davidson | FLSB Sport Glide 107 |
| 2023 | Harley-Davidson | FLTRK Road Glide Limited |
| 2023 | Harley-Davidson | FLTRT Road Glide 3 |
| 2023 | Harley-Davidson | FLTRX Road Glide |
| 2023 | Harley-Davidson | FLTRXS Road Glide Special |
| 2023 | Harley-Davidson | FLTRXST Road Glide ST |
| 2023 | Harley-Davidson | FXBBS Street Bob 114 |
| 2023 | Harley-Davidson | FXBR Breakout 117 |
| 2023 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2023 | Harley-Davidson | FXLRS Low Rider S 117 |
| 2023 | Harley-Davidson | FXLRST Low Rider ST 117 |
| 2023 | Harley-Davidson | FXST Softail Standard 107 |
| 2023 | Harley-Davidson | Road King Police FLHP |
| 2024 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2024 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2024 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2024 | Harley-Davidson | FLHRXS Road King Special |
| 2024 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2024 | Harley-Davidson | FLHTK Ultra Limited |
| 2024 | Harley-Davidson | FLHX Street Glide |
| 2024 | Harley-Davidson | FLI Hydra-Glide Revival |
| 2024 | Harley-Davidson | FLRT Freewheeler |
| 2024 | Harley-Davidson | FLSB Sport Glide 107 |
| 2024 | Harley-Davidson | FLTRK Road Glide Limited |
| 2024 | Harley-Davidson | FLTRT Road Glide 3 |
| 2024 | Harley-Davidson | FLTRX Road Glide |
| 2024 | Harley-Davidson | FXBBS Street Bob 114 |
| 2024 | Harley-Davidson | FXBR Breakout 117 |
| 2024 | Harley-Davidson | FXLRS Low Rider S 117 |
| 2024 | Harley-Davidson | FXLRST Low Rider ST 117 |
| 2024 | Harley-Davidson | FXST Softail Standard 107 |
| 2024 | Harley-Davidson | Road Glide Police FLTRXP |
| 2024 | Harley-Davidson | Road King Police FLHP |
| 2025 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2025 | Harley-Davidson | Electra Glide Police FLHTP |
| 2025 | Harley-Davidson | FLHRXS Road King Special |
| 2025 | Harley-Davidson | FLHX Street Glide |
| 2025 | Harley-Davidson | FLHXU Street Glide Ultra |
| 2025 | Harley-Davidson | FLTRX Road Glide |
| 2025 | Harley-Davidson | FXBR Breakout 117 |
| 2025 | Harley-Davidson | FXLRS Low Rider S 117 |
| 2025 | Harley-Davidson | FXLRST Low Rider ST 117 |
| 2025 | Harley-Davidson | Road Glide Custom FLTRX |
| 2025 | Harley-Davidson | Road Glide Police FLTRXP |
| 2025 | Harley-Davidson | Road King Police FLHP |
| 2025 | Harley-Davidson | Softail Breakout FXBR |
| 2025 | Harley-Davidson | Softail Fat Boy FLFB |
| 2025 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2025 | Harley-Davidson | Softail Low Rider S FXLRS |
| 2025 | Harley-Davidson | Softail Low Rider ST FXLRST |
| 2025 | Harley-Davidson | Softail Street Bob FXBB |
| 2025 | Harley-Davidson | Street Glide EFI FLHX |
Fitment details provided by supplier.
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