The Koni 2100 FSD front shock is a twin-tube hydraulic, non-adjustable front shock absorber specified for Chevy Express 3500/4500 applications. The description identifies the shock type and intended vehicle fit for front suspension replacement or refresh. This hydraulic twin-tube unit is offered as a direct-replacement front shock for the listed Chevy Express models and is aimed at restoring damping performance.
Koni Chevy Express 3500/4500 Front Shock