Bilstein Disc 28/40 8mm ID E4-FE1-Z003B41

Precision shock tuning demands components engineered to exact tolerances, and this Bilstein disc valve delivers the repeatability and durability that separates dialed setups from mediocre ones. Whether you're fine-tuning damping characteristics on a track car or building a custom suspension system, this OEM-quality disc ensures consistent valve response across thermal cycles and high-load conditions. A single worn or improperly sized valve disc can compromise your entire shock package—this is the part that keeps performance predictable.

• Bilstein OEM disc valve
• 1.102" outer diameter
• 0.315" inner diameter
• 0.016" thickness
• 8mm ID specification
• Natural finish
• Sold individually
• CNC precision tolerances
• Shock tuning application