Thundermax ThunderMax Engine Control Unit - 309-591 For Harley Touring 2021-2024 Product Type_Exhaust Systems 5 CM (6-1/2") / 6-1/2"

5 CM (6-1/2") / 6-1/2" / 16

5" rotors will fit 84-99 applications if used in conjunction with spacer and PM calipers

2017-2021 Harley-Davidson CVO Electra Glide Ultra Limited FLHTKSE 2017-2021 Harley-Davidson CVO Street Glide FLHXSE 2017-2020 Harley-Davidson Electra Glide Police FLHTPI 2017-2019 Harley-Davidson Electra Glide Ultra Classic FLHTCU 2017-2021 Harley-Davidson Electra Glide Ultra Limited FLHTK 2017-2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL 2017-2021 Harley-Davidson Freewheeler FLRT 2017-2021 Harley-Davidson Road Glide FLTRX/FLTRXS 2017-2019 Harley-Davidson Road Glide Ultra FLTRU 2017-2021 Harley-Davidson Road King FLHR/FLHRC 2017-2021 Harley-Davidson Road King Special FLHRXS 2017-2021 Harley-Davidson Street Glide FLHX/FLHXS 2017-2021 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG 2018-2021 Harley-Davidson CVO Road Glide FLTRXSE 2018-2020 Harley-Davidson Softail Breakout 114 FXBRS 2018-2019 Harley-Davidson Softail Breakout FXBR 2018-2020 Harley-Davidson Softail Deluxe FLDE 2018-2021 Harley-Davidson Softail Fat Bob 114 FXFBS 2018-2019 Harley-Davidson Softail Fat Bob FXFB 2018-2021 Harley-Davidson Softail Fat Boy 114 FLFBS 2018-2019 Harley-Davidson Softail Fat Boy FLFB 2018-2021 Harley-Davidson Softail Heritage Classic 114 FLHCS 2018-2021 Harley-Davidson Softail Heritage Classic FLHC 2018-2020 Harley-Davidson Softail Low Rider FXLR 2018-2021 Harley-Davidson Softail Slim FLSL 2018-2021 Harley-Davidson Softail Sport Glide FLSB 2018-2020 Harley-Davidson Softail Street Bob FXBB 2019-2021 Harley-Davidson Electra Glide Standard FLHT 2019-2020 Harley-Davidson FXDR 114 (FXDRS) 2020-2021 Harley-Davidson CVO Tri Glide FLHTCUTGSE 2020-2021 Harley-Davidson Road Glide Limited FLTRK 2020-2021 Harley-Davidson Softail Low Rider S FXLRS 2020-2021 Harley-Davidson Softail Standard FXST 2021 Harley-Davidson Softail Street Bob 114 FXBBS

to prevent galling and promote more consistent torque loading

Legend REVO coil suspension uses Legend’s Touring spring rates to produce superior ride quality and performance designed specifically for Touring models

Thundermax ThunderMax Engine Control Unit - 309-591 For Harley Touring 2021-2024 Product Type_Exhaust Systems 5 CM (6-1/2") / 6-1/2"Features 2 wide band Bosch 5 wire oxygen sensors (18 mm) with AutoTune connection harness ThunderMax quick start easy install and printable comprehensive users manual Never outgrow it easily accomodates bike change No Dyno required automatically tunes for riding style and riding conditions ThunderMax performance engine control module (ECM) 100% engineered and made in the USA Easy to install and simple to use Specs PRODUCT NAME ELECTRONIC CONTROL