Bilstein 33-104645 Suspension Shock Absorber - Front

Bilstein B8 5125 Shock Absorber Overview

The Bilstein B8 5125 shock absorber is built for custom suspension applications where a direct-fit Bilstein shock is not available. This eye-to-eye, non-adjustable monotube shock uses a 46mm piston and self-adjusting deflective disc valving to deliver controlled damping for front suspension setups on select Ford heavy-duty trucks and SUVs.

Compatible with 1999-2004 Ford F-250 Super Duty front, 1999-2004 Ford F-350 Super Duty front, and 2000-2005 Ford Excursion front when used with a double shock kit, part number 33-104645 is a practical choice for builders working on custom ride-height or suspension geometry requirements.

Key Features

• Bilstein B8 5125 series shock absorber for custom applications
• Eye-to-eye mount configuration with 5/8 inch upper and lower eye bushings
• 46mm monotube body with smooth-body, non-coilover design
• Non-adjustable damping with self-adjusting deflective disc valving
• Collapsed length: 15.91 in. / Extended length: 25.93 in.
• Zinc-plated finish with black bellows boot included
• Front-position application for select Ford Super Duty and Excursion setups

Product Details

The Bilstein B8 5125 line is aimed at suspension builders who need a shock absorber in a specific length and valving range rather than a direct OE replacement. Part number 33-104645 features Bilstein’s high gas pressure monotube construction, a 46mm piston, and consistent damping response for custom front-end installations. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Use this shock on 1999-2004 Ford F-250 Super Duty front, 1999-2004 Ford F-350 Super Duty front, and 2000-2005 Ford Excursion front with a double shock kit. The B8 5125 product line is commonly selected when the suspension setup requires specific eye-to-eye dimensions and controlled rebound/compression characteristics rather than a standard OE-style fitment.

What This Shock Absorber Helps Address

• Front suspension control on lifted or custom-built Ford truck and SUV setups
• Excessive bounce after bumps or dips
• Unstable ride quality from mismatched shock length or valving
• Need for an eye-to-eye shock in a specific collapsed and extended length range
• Suspension tuning for double shock front applications

Installation Notes and Fitment

Fits 1999-2004 Ford F-250 Super Duty, front, use with double shock kit; B8 5125. Fits 1999-2004 Ford F-350 Super Duty, front, use with double shock kit; B8 5125. Fits 2000-2005 Ford Excursion, front, use with double shock kit; B8 5125.

Verify eye-to-eye mounting, available suspension travel, and the required double shock kit before installation. Confirm collapsed and extended lengths against the vehicle’s front suspension geometry to avoid topping out or bottoming out during operation. Professional installation is recommended for custom suspension work.

Quality Assurance

Bilstein manufactures the B8 5125 series with a monotube internal design, zinc-plated finish, and self-adjusting valving for consistent performance in custom suspension applications. Part number 33-104645 is built to Bilstein’s established shock absorber standards for fitment-specific front suspension use.