Bilstein B12 Pro-Kit 46-276346 – BMW M3 (E9x)

OVERVIEW

The BILSTEIN B12 (Pro-Kit) is a matched, fixed-height performance suspension package: a complete set of BILSTEIN Performance dampers paired with application-specific EIBACH Pro-Kit progressive-rate lowering springs, providing moderate lowering between 24 and 40 mm depending on application.

Dampers and springs are tuned together for each specific vehicle rather than sold as generic parts — BILSTEIN's Professional Cornering System (PCS) — for precise response, predictable control and a lower, action-ready stance.

The B12 (Pro-Kit) is the product of two companies at the top of their industries: the shock absorber experts at BILSTEIN and the spring professionals at EIBACH. BILSTEIN dampers use monotube gas pressure technology and are made in Germany.

SPECS

• BILSTEIN damper family: B12 (Pro-Kit) — fixed-height performance kit
• Internal design: monotube gas pressure
• Not ride-height adjustable
• Springs: EIBACH Pro-Kit, application-specific progressive rate
• Lowering: moderate, 24–40 mm depending on application
• Finish: dampers yellow / springs dark gray
• Made in Germany
• Warranty: BILSTEIN Limited Lifetime Warranty
• Position: front and rear (complete four-corner kit)

PARTS INCLUDED

• Four BILSTEIN B12 (Pro-Kit) performance dampers — front and rear
• Four EIBACH Pro-Kit application-specific progressive-rate lowering springs — front and rear

TECH RESOURCES

Additional Parts Required

• Check EDC. Confirm whether your M3 is equipped with Electronic Damping Control (EDC) before ordering — BILSTEIN also catalogs other B12 (Pro-Kit) kits for the E9X M3 (46-276339 and 46-180698); contact Speed Logic to confirm the correct kit for your car.
• Four-wheel alignment. A full four-wheel alignment is required after installation.
• Professional installation. BILSTEIN requires that the work be carried out by a qualified technician on a chassis hoist with proper spring-compression equipment.
• Installer-supplied: chassis hoist or jack stands, spring compressor and a torque wrench — do not use impact tools on suspension fasteners.

Installation

• Bilstein general installation instructions (Generic_instructions_02, PDF) — BILSTEIN publishes general instructions for this kit rather than a vehicle-specific guide; use them alongside the BMW factory repair procedure.
• Bilstein shock absorber installation safety notice (PDF)

PART NUMBER

• Bilstein part number: 46-276346

VEHICLE APPLICATIONS