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The AST 5100 Street coilover kit for 2015–2023 Audi A4 B9 FWD is a monotube coilover system with 1-way rebound adjustment and ride-height tuning. It includes vehicle-specific spring rates, OEM-compatible top mounts and rebuildable dampers; front units are coilover-style while rears use a divorced setup similar to OEM. Made in the Netherlands, it balances everyday comfort with precise handling.
AST 15-23 Audi A4 B9 FWD 5100 Street Coilovers w/ Springs
