Bilstein B8 5125 Shock Absorber, Eye/Eye, 17.01" Collapsed, Black Bellows Boot

The Bilstein B8 5125 series exists specifically for custom suspension builders who need a high-quality monotube shock outside the standard direct-fit catalog. This unit runs an eye/eye mount configuration with 5/8-inch hourglass bushings on both ends, a 46mm piston with self-adjusting deflective disc valving, and a zinc-plated finish protected by a black bellows boot. Collapsed length is 17.01 inches, extended length is 28 inches, and stroke travel measures 10.99 inches — numbers that matter when you're matching a shock to a custom bracket or non-OEM mounting setup.

The valving data tells the real story: compression at 52 m/s comes in at 620, rebound at 52 m/s at 2495. That wide spread between compression and rebound is characteristic of a shock tuned to absorb hard hits while maintaining controlled body movement on the return stroke. The 14mm shaft diameter adds stiffness against side loading in lifted or custom applications.

We recommend this shock to builders who are fabricating custom suspension geometry and need a proven monotube unit with defined specs rather than a vague "universal" option. The smooth body, non-coilover design keeps packaging simple. Note the 90-day limited warranty — standard for the B8 5125 custom-fitment line.