Feuling Reaper 521 Cam for 2017-2024 Harley M8*

NOTE Due to the unstable nature of this 4-valve engine design with one rocker arm activating two valve springs, Feuling highly recommends running one-piece pushrods over quick-install adjustable pushrods to maintain maximum cam valve lift and reduce valvetrain harmonics and associated hydraulic lifter issues.

NOTE Feuling fastener kit PART #3047 also highly recommended to help prevent cylinder head cracking; kit replaces the rocker shaft bolts with studs and nuts to help reduce the stress of the rocker shaft standoffs.

The 521 Reaper Cam from Feuling for the Harley Softail M8 motor.

This Cam is designed to compliment 114" or larger cubic in engines with added compression. High flow exhaust and air cleaner combo is highly recommended for the best performance. Requires high lift valve springs.Fits 2017-2024 Harley M8 Models - (Excludes VVT Models)Aggressive pulling power with a "nasty" sound, the Reaper 521 grind will shine in 114" and larger cubic inch engines with added compression ratio

Requires high lift valve springs; PART #0926-2973 or 0926-2974

Stock throttle body produces an excellent powerband; use of a high-flow throttle body may increase peak power numbers2250 - 6250 rpm range

Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range

A high-flow exhaust system and air cleaner is highly recommended for optimal performance

Feuling recommends matching 521 cam with Race Series oiling system PART #0932-0199Heavy-duty one-piece pushrods are also highly recommended; see PART #0928-0091

NOTE Due to the unstable nature of this 4-valve engine design with one rocker arm activating two valve springs, Feuling highly recommends running one-piece pushrods over quick-install adjustable pushrods to maintain maximum camvalve lift and reduce valvetrain harmonics and associated hydraulic lifter issues.

NOTE Feuling fastener kit PART #3047 also highly recommended to help prevent cylinder head cracking; kit replaces the rocker shaft bolts with studs and nuts to help reduce the stress of the rocker shaft standoffs.

FitmentYearMakeModel2017 - 2020Harley-DavidsonCVO Electra Glide Ultra Limited FLHTKSE2018 - 2019Harley-DavidsonCVO Road Glide Custom FLTRXSE2017 - 2020Harley-DavidsonCVO Street Glide FLHXSE2017 - 2019Harley-DavidsonElectra Glide Police FLHTPI2019 - 2020Harley-DavidsonElectra Glide Standard EFI FLHTI2017 - 2019Harley-DavidsonElectra Glide Ultra Classic EFI FLHTCUI2017 - 2020Harley-DavidsonElectra Glide Ultra Limited FLHTK2017 - 2019Harley-DavidsonElectra Glide Ultra Limited Low FLHTKL2019 - 2020Harley-DavidsonFXDR 1142017 - 2020Harley-DavidsonRoad Glide Custom FLTRX2020Harley-DavidsonRoad Glide Limited FLTRK2017 - 2020Harley-DavidsonRoad Glide Special FLTRXS2017 - 2019Harley-DavidsonRoad Glide Ultra FLTRU2017 - 2020Harley-DavidsonRoad King EFI FLHR2017 - 2020Harley-DavidsonRoad King Special FLHRXS2018 - 2020Harley-DavidsonSoftail Breakout 114 FXBRS2018 - 2019Harley-DavidsonSoftail Breakout FXBR2018 - 2020Harley-DavidsonSoftail Deluxe FLDE2018 - 2020Harley-DavidsonSoftail Fat Bob 114 FXFBS2018 - 2019Harley-DavidsonSoftail Fat Bob FXFB2018 - 2020Harley-DavidsonSoftail Fat Boy 114 FLFBS2018 - 2019Harley-DavidsonSoftail Fat Boy FLFB2018 - 2020Harley-DavidsonSoftail Heritage Classic 114 FLHCS2018 - 2020Harley-DavidsonSoftail Heritage Classic FLHC2018 - 2020Harley-DavidsonSoftail Low Rider FXLR2020Harley-DavidsonSoftail Lowrider S FXLRS2018 - 2020Harley-DavidsonSoftail Slim FLSL2018 - 2020Harley-DavidsonSoftail Sport Glide FLSB2018 - 2020Harley-DavidsonSoftail Street Bob FXBB2017 - 2020Harley-DavidsonStreet Glide EFI FLHX2017 - 2020Harley-DavidsonStreet Glide Special FLHXSFind the Feuling Reaper 521 Cam for 2017-2024 Harley M8 Electra Glide, Street Glide, Road Glide, Softail, Street Bob Fat Bob, Low Rider and Road King models