Bilstein AS3 Series shock absorbers are developed to deliver superior damping characteristics with virtually no rod pressure build-up. Based on Bilstein’s race-proven 46mm monotube design the AS3’s unique piggyback nitrogen chamber delivers a fade-free performance without the gas pressure buildup that’s common in conventional shock designs. The aluminum threaded body modular assembly with single adjustable shaft tuning is purchased as a dry kit with pistons piston bands and heims sold separately. The AS3 Series shock absorber offers consistent grip and optimal traction.