Bilstein 35-347934 Suspension Strut Assembly - Rear

Bilstein B8 Performance Plus Strut

The Bilstein B8 Performance Plus suspension strut assembly is built for drivers upgrading to lowering springs and looking for sharper handling response. This Bilstein 35-347934 uses a monotube design and application-specific valving to support more controlled performance in a sport-tuned setup.

Key Features

• Monotube internal design for consistent damping response.
• Application-specific valve settings matched to performance use.
• Blue bellows boot included for added protection.
• Fixed spring seat and stem upper mount for the listed applications.
• Yellow painted finish with Bilstein B8 Performance Plus series construction.

Detailed Description

Bilstein B8 Performance Plus dampers are engineered as an OE-style performance upgrade for vehicles running aftermarket lowering springs. This rear suspension strut assembly is designed around the needs of Porsche Cayman and Porsche Boxster applications, with fitment listed for 2005-2012 Porsche Cayman and 2005-2011 Porsche Boxster rear positions. The monotube layout helps maintain damping consistency, while the tuned valve settings are intended to complement lowered ride height and improve handling feel. Part number 35-347934 is also referenced as 35-122210 for the same application.

The B8 Performance Plus line focuses on controlled suspension response and a sportier stance without changing the basic OE mounting approach. For Porsche Cayman and Porsche Boxster owners comparing rear strut options, Bilstein 35-347934 provides a direct performance-oriented replacement within the specified fitment range.

What It Helps Address

• Excessive body motion after lowering the vehicle.
• Reduced damping control from worn rear struts.
• Uneven handling response in performance suspension setups.
• Loss of ride control when paired with lowering springs.
• Need for a rear strut matched to the listed Porsche applications.

Installation Notes and Tips

Compatible With 2006-2012 Porsche Cayman, rear; 2005-2010 Porsche Boxster, rear; and 2011 Porsche Boxster, rear. Verify that the vehicle is equipped without Electronic Suspension (PASM) where noted in fitment. Confirm collapsed and extended length requirements before installation, and match the strut to the correct rear application listed for your vehicle.

Quality Assurance

Bilstein states that B8 Performance Plus dampers are tested to meet or exceed OE standards. The B8 Performance Plus series is built for performance-focused suspension service with Bilstein engineering and application-specific tuning.