412 Series, 12.6in. Standard Spring Rate Rear Shock Absorbers - Black. Fits Dyna 1991-2017. - Progressive Suspension Exhaust Flanges & Associated Simply replace the factory ECM

Simply replace the factory ECM and oxygen sensors

* Avoid overtightened primary chain engine issues

* HHI-WGCK-C02 for XL’00-07 & FXD’00-03

giving riders confidence whether cruising city streets

412 Series, 12.6in. Standard Spring Rate Rear Shock Absorbers - Black. Fits Dyna 1991-2017. - Progressive Suspension Exhaust Flanges & Associated Simply replace the factory ECMFeatures & Benefits: * 412 Series Shock. * Best value shock on the market today. * Simple, durable design will be an improvement over the Original. * Double wall steel body construction. * Nitrogen charged, multi staged velocity sensitive valving. * Smooth, consistent damping. * Multi position cam style preload adjuster. * Progressively wound Spring. Tech Tips: * Standard Spring Rates are recommended for riders that weigh under 110kg. * Heavy Duty