Bilstein B8 5125 Shock Absorber 17.91 Eye/Eye Zinc-Plated Monotube

The Bilstein B8 5125 is built for custom suspension applications where a direct Bilstein fitment doesn't exist. This is the shock custom builders reach for when they're running a non-standard setup and need a Bilstein-quality solution to dial it in correctly.

The core specs here are real and matter: 46mm monotube construction with high gas pressure, a 14mm shaft, and self-adjusting deflective disc valving that reads changing surface conditions and responds instantly. This specific unit runs 17.91" collapsed and 29.69" extended, with 11.78" of stroke travel. Compression is rated at 595 and rebound at 1810 (at 52 m/s). Mount configuration is eye/eye with 5/8" hourglass bushings — industry standard sizing that fits a wide range of custom brackets and mounts.

The zinc-plated smooth body resists corrosion without a reservoir, keeping the package compact. A black bellows boot ships included. It's non-adjustable and non-coilover — straightforward, purpose-built hardware for builders who know exactly what travel and valving they need.

We recommend this shock to builders constructing custom link setups, long-travel configurations, or any application that falls outside Bilstein's bolt-on catalog. The B8 5125 line is sold by length and valve rate so you can spec precisely. This unit carries a limited 90-day warranty.