Dinan Adjustable Coilover Suspension System - BMW M5 (F90) 2018-2023

Dinan's coilover system retains the M5's factory electronic shocks while swapping in stiffer linear rate springs, with rates 20% higher in front and 15% higher in the rear; the rear progressive springs give way to a more predictable linear design for a compliant yet controlled ride. Black anodized 6061-T6 aluminum threaded collars set ride height, with a recommended drop of 1 inch front and 1-1/8 inch rear (up to 2 inches front and 2-1/8 inch rear are possible with reduced ride quality). Progressive bump stops and included suspension packers let you fine tune bump stop clearance to balance handling and comfort.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy