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[{"make":"Harley Davidson","model":"FLRT Freewheeler","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHTKL Electra Glide Ultra Limited Low","years":[2017,2018,2019]},{"make":"Harley Davidson","model":"FLTRXS Road Glide Special","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHR Road King","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHTCUTG Tri Glide Ultra Classic","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHTK Electra Glide Ultra Limited","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHX Street Glide","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLTR Road Glide","years":[2017,2018,2019,2020]},{"make":"Harley Davidson","model":"FLTRU Road Glide Ultra","years":[2017,2018,2019]},{"make":"Harley Davidson","model":"FLHXS Street Glide Special","years":[2017,2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHRXS Road King Special","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHTCU Electra Glide Ultra Classic","years":[2018,2019]},{"make":"Harley Davidson","model":"FLHXSE CVO Street Glide","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHTKSE CVO Limited","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FXBB Softail Street Bob","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FXFB Softail Fat Bob","years":[2018,2019]},{"make":"Harley Davidson","model":"FXLR Softail Low Rider","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLSB Softail Sport Glide","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLHC Softail Heritage Classic","years":[2018,2019,2020]},{"make":"Harley Davidson","model":"FLHCS Softail Heritage Classic 114","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLSL Softail Slim","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FXFBS Softail Fat Bob 114","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FXBR Softail Breakout","years":[2018,2019]},{"make":"Harley Davidson","model":"FXBRS Softail Breakout 114","years":[2018,2019,2020]},{"make":"Harley Davidson","model":"FLDE Softail Deluxe","years":[2018,2019,2020]},{"make":"Harley Davidson","model":"FLFB Softail Fat Boy","years":[2018,2019,2020]},{"make":"Harley Davidson","model":"FLFBS Softail Fat Boy 114","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FXDR Softail Power Cruiser","years":[2019]},{"make":"Harley Davidson","model":"FLHT Electra Glide","years":[2019,2020]},{"make":"Harley Davidson","model":"FLTRX Road Glide Custom","years":[2020,2021]},{"make":"Harley Davidson","model":"FLTRK Road Glide Limited","years":[2020,2021]},{"make":"Harley Davidson","model":"FLHTCUTGSE CVO Tri Glide","years":[2020,2021]},{"make":"Harley Davidson","model":"FXDRS Softail FXDR 114","years":[2020]},{"make":"Harley Davidson","model":"FXLRS Softail Low Rider S","years":[2020,2021]},{"make":"Harley Davidson","model":"FLTRXSE CVO Road Glide","years":[2018,2019,2020,2021]},{"make":"Harley Davidson","model":"FLH Electra Glide","years":[2021]}]
Increase displacement. Increase performance. Built in the USA for riders who demand reliable, bolt-on horsepower, Rocket Performance Garage Big Bore Cylinder Kits upgrade 2007–2016 Harley V-Twin 96" and 103" motors to a potent 110".
Designed by industry-leading manufacturers and tested by experienced racers, these kits deliver reliable torque and smooth power delivery ideal for street and performance builds. Consult Rocket Cams' cam and component suggestion chart for optimized results and customer satisfaction.
Why choose Big Bore Cylinder Kits? Proven materials, precision fitment, complete gasket set, and a direct increase in displacement for a significant performance upgrade without extensive modification.