BMW M240i Coilover Suspension Kit - Dinan - Supplemental Ride Quality & Handling Kit (2017–2021). Designed to be paired with Dinan performance spring sets, it adds tuned, progressive bumpstops that preserve travel and sharpen response on lowered F22 230i/M240i models.

By maximizing compression travel within the spring, the kit helps prevent harsh bottoming while maintaining composure over uneven pavement. The result is improved ride refinement with added mechanical grip and predictable cornering when driving hard. OE-quality materials ensure consistent, progressive characteristics, and each bumpstop is calibrated specifically for use with Dinan springs. Installation on M235i/M240i is approximately 7.8 hours when installed alone, and is minimal when done with the springs.

Features

• Includes four progressive-rate bumpstops
• Tuned for 2017–2021 BMW 230i/M240i (F22) with Dinan springs
• Maximizes suspension travel on lowered vehicles
• Reduces the chance of bottoming under load
• Enhances grip and cornering consistency
• OE-quality construction for durability

Ready to fine-tune your BMW’s balance? Call with questions or to schedule installation: 512-982-9393 (TX), 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area offering installation and customization services. Considering multiple items? Contact us for shipping discounts. We install on premises at both locations.

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