Bilstein Replacement B1 Suspension Hardware Kit

This universal Bilstein coilover system is selected by exact manufacturer part number B4-KT1-Z223A01. Confirm its dimensions, mounting interface, position, quantity, and intended suspension function before ordering.

Key Features

• OEM Specification: Matches original equipment dimensions and material grades.
• Direct Replacement: Designed as a service part for existing Bilstein installations.
• Application Specific: Verified fitment for listed vehicle and shock combinations.
• Recommended during shock or strut replacement.
• Proven track record in motorsport and OEM supply.
• Designed to maintain original suspension geometry.

Fitment

Specifications

What’s Included

One new Bilstein product identified by manufacturer part number B4-KT1-Z223A01. Mounts, isolators, fasteners, alignment parts, bump stops, tools, and companion components are included only when expressly stated for this exact part number.

About Bilstein

Bilstein develops lowering, lifting, shock, strut, coilover, spring, sway-bar, spindle, and related suspension products for trucks, SUVs, and performance vehicles. Product selection remains exact-application and exact-part-number specific.

Related Bilstein Products

• Bilstein 20-22 Toyota GR Supra B3 OE Replacement Suspension Kit – Front / Rear
• Bilstein 05-12 Porsche Boxster (w/ PASM) B16 (DampTronic) Suspension Kit – Front & Rear
• Bilstein 06-13 Porsche 911 (Sport Spring Version) B16 (PSS10) Suspension Kit – Front & Rear

Browse the Bilstein collection for related suspension components.

Frequently Asked Questions

Is this Bilstein part vehicle specific?
No verified vehicle YMM is assigned. Match the exact dimensions, mounting interface, position, quantity, suspension configuration, and intended function before ordering.

Will I need an alignment after installation?
An alignment is recommended whenever ride height or suspension geometry changes. Verify tire clearance, steering travel, brake-line routing, headlight aim, and all fastener torque after the work.

Does this include every part needed for installation?
Only parts expressly stated for this exact manufacturer part number are included. Reuse or replacement of mounts, isolators, hardware, alignment parts, bump stops, and related components depends on the application.

Installation Instructions

Follow the current Bilstein instructions and vehicle service information for this exact part number. Support the vehicle safely, use the specified tools and torque values, inspect all mounts and hardware, verify brake-line and tire clearance, settle the suspension, and complete an alignment when geometry or ride height changes. Professional installation is recommended.