Raises RPM to achieve maximum performance eliminating lugging of motor. Changes stock 1.352 gear ratio to 1.5333 gear ratio. - 4th gear 70 MPH @ 3620 RPM to New 4th gear 70 MPH @ 4500 RPMs. - 5th gear 70 MPH @ 3042 RPM to New 5th gear 70 MPH @ about 3750 RPMs. - 6th gear 70 MPH @ 2570 RPM to New 6th gear 70 MPH @ about 3250 RPMs. Manufactured from aircraft quality steel. Heat-treated to specifications to insure maximum strength. 2 lbs. lighter than stock. Includes 30 tooth sprocket, custom primary chain and easy-to-follow instruction. Made in USA. 3-year limited manufacturers warranty. Note: Evolution Industries recommends installing a sprocket bolt when changing sprocket.This item fits the following models: 2011-2013 Harley Davidson FLHR Road King2011-2013 Harley Davidson FLHRC Road King Classic2011-2013 Harley Davidson FLHTC Electra Glide Classic2011-2013 Harley Davidson FLHTCU Electra Glide Ultra Classic2011-2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic2011-2013 Harley Davidson FLHTK Electra Glide Ultra Limited2011-2013 Harley Davidson FLHX Street Glide2011-2013 Harley Davidson FLTRU Road Glide Ultra2011-2013 Harley Davidson FLTRX Road Glide Custom
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