412 Series, 12in. Rear Shock Absorbers with Full Covers - Chrome. Fits 4Spd Big Twin 1973-1986

Features & 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 travel will not cause clearance issues.

* Performance Suspension Upgrades provide better handling through a Stiffer more controlled Ride.

* On Big Twin FL Models 1973-1986 Standard Length is 12".

Proudly Made by Progressive Suspension !