Bilstein 24-249508 Suspension Shock Absorber - Rear

Bilstein B8 Rear Shock for Subaru WRX STI

The Bilstein B8 Performance Plus rear shock absorber is built for Subaru WRX and WRX STI owners running lowering springs and looking for tighter control at the rear axle. This application-specific damper uses a monotube design and Bilstein’s yellow-painted finish for a performance-focused OE replacement with a sportier stance.

Part number 24-249508 is engineered for the rear position on 2015-2021 Subaru WRX and 2015-2021 Subaru WRX STI. It is a direct-fit suspension shock absorber for lowered setups that need firmer damping control without changing the vehicle’s basic suspension layout.

Key Features

• Bilstein B8 Performance Plus series rear shock absorber
• Monotube internal design for consistent damping response
• Application-specific valve settings for lowered-spring setups
• Yellow painted finish
• Upper mount type: stem
• Lower mount type: eye 12.4mm
• Boot not included

Product Details

Bilstein B8 Performance Plus dampers are tuned as a performance upgrade over OE dampers and are intended for use with aftermarket lowering springs. For Subaru WRX and Subaru WRX STI rear suspension applications, this shock absorber helps restore control after lowering while maintaining the ride quality and handling balance expected from a Bilstein monotube damper. Part number 24-249508 is tested to meet or exceed OE quality standards and is built for drivers who want a more controlled rear suspension response.

This part cross-references Monroe Shocks & Struts (e.g., 494581, 24249508) for the same application.

What It Helps Address

• Excess rear suspension bounce after lowering springs are installed
• Reduced damping control in the rear of a lowered WRX or WRX STI
• Loose or unsettled rear-end handling during cornering
• Mismatch between OE shocks and performance lowering springs
• Need for a direct-fit rear shock upgrade on lowered Subaru suspension setups

Installation Notes

Compatible With 2015-2021 Subaru WRX, rear, and 2015-2021 Subaru WRX STI, rear. Verify spring and suspension configuration before installation, especially on lowered vehicles. This rear shock uses a stem upper mount and an eye 12.4mm lower mount. Boot is not included.

Quality Assurance

Bilstein rigorously tests B8 Performance Plus dampers to meet or exceed OE standards. The 24-249508 rear shock is part of Bilstein’s B8 Performance Plus line, which focuses on controlled damping for lowered applications and consistent performance under street use.