Bilstein B4 gas rear shock absorber, sold individually, to fit Vanagon, not Syncro models.

The Bilstein B4 Gas Pressurised Shock Absorber is a top quality shock built by an OEM supplier, and designed to give a performance improvement over the standard oil filled shock absorbers. 

Gas shocks give improved handling and road-holding over their oil filled counterparts; the pressurisation of the shock ensuring your wheels remain firmly on the road in all conditions. 

These are an ideal upgrade shock if you want to help improve the handling characteristics of your van by reducing roll and boat-like handling of a standard Vanagon by firming up the suspension while maintaining good levels of ride comfort.