412 Series, 13.5in. Rear Shock Absorbers with Full Covers - Chrome. Fits Big Twin 1958-1972. DNA-23390250 * Generator Drive Gear EMP-A-31070-58

* Generator Drive Gear EMP-A-31070-58

1:1 Compression Ratio with S&S 89cc Heads # SS90-1106

* Matching Rear Passenger Footpegs # AN-400-054

* Replaces OEM # 57852-02A

412 Series, 13.5in. Rear Shock Absorbers with Full Covers - Chrome. Fits Big Twin 1958-1972. DNA-23390250 * Generator Drive Gear EMP-A-31070-58Features & 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: * If you are purchasing longer or shorter suspension, confirm that changing your Suspension