Bilstein B4 OE Replacement Rear Shock Absorber - Porsche 911 (997) 2005-2012

The Bilstein B4 is the OE replacement damper for the 997 generation 911, a monotube gas pressure unit valved to restore the factory ride and body control rather than change it. Gas pressure keeps the oil from foaming under repeated compression, so damping stays consistent over broken pavement and through long corners instead of fading. It measures 15.35 in collapsed and 21.24 in extended, mounts by an upper stem and a lower clevis, and carries a clear anodized finish. This damper is valved for cars on the standard suspension and does not fit a 911 equipped with PASM.

Specifications

Documents: Installation Instructions (PDF)  |  Safety Data Sheet (PDF)

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