OEM Moto Guzzi Ohlins Rear Shock - 2S001396
Complete fitment list at bottom of this page.
Official Moto Guzzi accessory performance rear shock
Swedish made Shock absorber with hydraulic compression, rebound and spring pre-load adjustment.

Spring is progressively wound with a resistance range of 60 - 80 N / mm  (Spring is Ohlins part number 01106-05/60-80)
This shock is a huge step up if you want more precise and predicable suspension performance, especially in high heat or high frequency situations.