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

The Bilstein B8 5125 is built for custom suspension builders who need a high-quality monotube shock outside Bilstein's direct-fitment catalog. This is the shock we recommend when a builder is working with a custom suspension setup that requires a specific length and valve rate rather than an off-the-shelf application-matched unit.

The specs here are what matter: 46mm piston diameter, 14mm shaft, eye/eye mount with 5/8-inch hourglass bushings, and a zinc-plated smooth body. Collapsed length is 17.91 inches, extended length is 29.69 inches, and stroke travel is 11.78 inches — numbers that matter when you're building to a specific lift height or custom geometry. Compression is rated at 620 and rebound at 2495 at 52 m/s, with self-adjusting deflective disc valving that responds to changing surface conditions without driver input.

It ships with a black bellows boot and carries Bilstein's limited 90-day warranty. No reservoir, non-adjustable, smooth body — straightforward hardware designed to perform in a high-gas-pressure monotube format without unnecessary complexity.

If your build has a verified travel requirement that fits within this shock's range, this is a legitimate Bilstein-quality solution for applications where a catalog part doesn't exist. Verify your collapsed and extended length requirements before ordering.