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* High-strength seamless double-butted 7075-T6 alloy
Point-to-point directions for every ride
Counterintuitive though it might seem
The inner part of the Pinlock is lined with a silicon bead
Tool-free shield removal
PROGRESSIVE SUSPENSION 412 Series, 11" Rear Shock Absorbers With Full Cover - Chrome. Fits Big Twin 1973-1986 Colour:Chrome * High-strength seamless double-butted 7075-T6Features & 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