Bilstein B8 8100 ZoneControl R DSA Rear Shock Absorber - Ford F-250 / F-350 Super Duty 2005-2016

The B8 8100 ZoneControl R DSA is an adjustable large bore 60mm (2.65 in outside diameter) reservoir shock for lifted trucks and SUVs. Click adjuster knobs set low and high speed compression independently, so damping can be matched to the surface rather than fixed at build. ZoneControl R's double piston design adds position sensitive rebound damping, eliminating harsh top-out and the need for an external limit strap, while the monotube body and velocity sensitive digressive valving tuned per application keep performance fade free. Each unit ships with a remote or piggyback reservoir depending on the application.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy