Bilstein B8 5125 Custom Application Monotube Shock Absorber 33-186542
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
Description
Description
Build a custom suspension setup with the Bilstein B8 5125 Suspension Shock Absorber. Designed for custom applications where direct-fit Bilstein options are unavailable, the B8 5125 Series offers multiple lengths and valving options to support a wide range of suspension builds. Featuring a high-pressure gas monotube design, 46mm piston, and self-adjusting deflective disc valving, this shock is built for custom suspension performance. MPN: 33-186542.
Why Choose the Bilstein B8 5125 Suspension Shock Absorber?
- Custom Suspension Solution – Designed for vehicles and builds that require a non-standard shock application.
- High-Pressure Gas Monotube Design – Provides consistent damping performance and improved heat management.
- 46mm Piston Technology – Delivers responsive suspension control across a variety of driving conditions.
- Self-Adjusting Valving – Features deflective disc valving for optimized damping performance.
- Multiple Configuration Options – Available in various lengths, valve rates, and mounting configurations to fit custom applications.
- Built for Suspension Builders – Ideal for custom truck, off-road, and performance suspension projects.
Installation Highlights
The Bilstein B8 5125 Series is designed for custom suspension installations and includes industry-standard 5/8 inch hourglass bushings. Shocks are available in eye/eye or stem/eye mounting configurations depending on application requirements.
Specifications
- Part Number: 33-186542
- Series: B8 5125
- Product Type: Suspension Shock Absorber
- Piston Diameter: 46mm
- Mounting Bushings: 5/8 inch hourglass bushings
- Mounting Configuration: Eye/Eye or Stem/Eye
- Weight: 4.81 lbs
Key Features at a Glance
- B8 5125 Series Performance - Designed for custom suspension applications.
- Monotube Shock Construction - Provides consistent performance and durability.
- 46mm Piston Design - Offers responsive damping control.
- Custom Length & Valving Options - Supports a wide range of suspension builds.
- Bilstein Engineering - Built for reliable performance in demanding applications.
Notes
- MPN: 33-186542
- The B8 5125 Series is intended for custom applications and does not require direct Bilstein vehicle fitment.
- Verify required shock length, valve rate, and mounting configuration before installation.
SKU: 33-186542
Questions? We’re Here to Help.
Have questions about upgrades for your suspension setup? Contact FASS Motorsports and we’ll get you dialed:
Phone: 636-429-7020
Email: info@fassmotorsports.com
