QA1 DS401 Proma Star Single Adjustable Coil-Over Shock. 10.125/14 Comp/Ext

They are 100% dyno tested and serialized, Has simultaneous compression and rebound adjustment, One knob allows you to choose from 18 valving options, Features a precision machined aluminum piston with a PTFE piston band, Includes a 5/8″ centerless ground, hard chrome plated, solid piston rod.