Abstract: A gas pressure adjustable aluminum shock absorber to pressurize oil therein mounts between a vehicle and an axle and includes a threaded aluminum shock body tube, a bore therein an aluminum body mounting loop with an internal female thread to couple in threaded engagement with the threaded aluminum shock body tube for fluid tight connection, an aluminum shaft in the bore extends outwardly, and a damper piston is concentrically atop the aluminum shaft for sliding sealing engagement with the bore. Adjustable flow orifices through the damper piston restrains piston and shaft reciprocation therein and co-acting with hydraulic fluid therein and thereabout. An aluminum seal head internally threaded with an internal female to couple in threaded engagement with the threaded aluminum shock body tube for fluid tight connection and seals in the aluminum seal head to engage the aluminum shaft.