Bilstein 25-305364 B8 8100 Series Reservoir Bypass Front Passenger Side Shock 3-4IN Lifts | 20-UP Jeep Gladiator JT

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Bilstein 25-305364 B8 8100 Series Reservoir Bypass Front Passenger Side Shock 3-4IN Lifts | 20-UP Jeep Gladiator JT


Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit

Bilstein B8 8100 (Bypass) is a direct fit, position sensitive, damper for light trucks and SUV’s. These motorsports inspired shock absorbers utilize a dual tube externally adjustable bypass design. B8 8100 (Bypass) feature “Incremental Flow” bypass adjusters, allowing for finite and incremental changes for rebound and compression. The shocks utilize a bottom hose, remote reservoir exit port, delivering increased compression control during the full cycle. The remote reservoir is supplied with a bolt-on aluminum anodized chassis mount for an easy fitment. BILSTEIN B8 8100 (Bypass) will maximize the driver experience, offering unparalleled ride comfort and incredible bottom out control.


  • The Bump Zone, located above the compression bypass tube, increases bottoming control and eliminates the need for a hydraulic bump stop

  • Dual tube external bypass offers position sensitive damping with independent adjustment for rebound and compression

  • Incremental flow adjuster offers finite and incremental changes in damping force for precise adjustments

  • Vehicle specific tuning with the ability to make a wide range of adjustments

  • 60mm large bore hard anodized aluminum piston offers a greater range of damping control and delivers exceptional long-term durability

  • Bottom port reservoir hose provides increased bottom out control during the compression cycle

  • 60mm remote reservoir with machined aluminum chassis mounts

  • 18mm piston rod provides brute tensile strength and reduces internal gas force ramp-up providing a smoother ride

  • Billet rod end with vulcanized mounts for an exact OE fit and long-term durability

  • Direct fit for easy installation

  • Owner rebuildable


  • Collapsed Length (IN):  18.11

  • Extended Length (IN):  29.13

  • Collapsed Length (MM):  460

  • Extended Length (MM):  740.0

  • Finish:  Zinc Plated

  • Reservoir:  Yes

  • Body Design:  Bypass Body (Non-Coilover)

  • Body Diameter:  60mm

  • Adjustable Damping:  Double Adjustable – Compression and Rebound

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