Bilstein B4 OE Replacement Suspension Strut Cartridge

The Bilstein B4 OE Replacement Suspension Strut Cartridge is a precision-engineered damping solution designed to restore your vehicle's original factory ride quality, handling, and safety characteristics. Each B4 strut cartridge is manufactured to meet or exceed original equipment specifications — the same exacting standards that have made Bilstein a trusted OE supplier to the world's leading automakers for over 60 years.

Key Features:

• Dual damping technology options — available in both gas-pressure mono-tube and twin-tube configurations, each selected to precisely match the factory suspension design of the specific application
• Application-specific valving — every cartridge is individually calibrated to replicate the ride and handling characteristics engineered by the original vehicle manufacturer, preserving factory ride height and suspension geometry
• Meets or exceeds OE specifications — manufactured to the same standards as factory-installed components, ensuring consistent, like-new performance from day one
• Direct-fit installation — designed to install directly into the existing strut housing without modification, simplifying the replacement process for professional technicians and DIYers alike
• Hardware included — necessary washers, bushings, reservoir clamps, and nuts are included where applicable; factory shock mounting bolts are reused during installation
• Premium construction — high-quality materials and rigorous quality control deliver consistent performance and long service life under demanding real-world road conditions
• Limited Lifetime Warranty — Bilstein gas-pressure shock absorbers are backed by a lifetime warranty against defects in materials and workmanship for the original purchaser

Bilstein pioneered the mono-tube gas-pressure shock absorber for series production over six decades ago, and the B4 product line brings that same OE-level engineering expertise directly to the aftermarket. Whether you're restoring a high-mileage suspension or replacing a failed unit, the B4 strut cartridge is the definitive choice for drivers who demand factory performance standards — without compromise.