GO WESTY. Vanagon 1980-91 Extra Heavy Duty Bilstein Shocks Set for 2WD. This exclusive "XHD (Extra Heavy Duty)" version was born from a collaborative effort between the engineers at GoWesty and those at Bilstein. The GoWesty XHD Bilstein shocks are identical to the regular HD shocks on the outside, and fit the exact same way. The difference is all on the inside valve settings that achieve the following results: 80% more front and 40% more rear rebound dampening than the HD model , 57% more front and 20% more rear compression dampening than the HD model. Great for loaded up campers.