BMW M4 Coilover Suspension Kit - KW - Height Adjustable Spring (H.A.S.) - 2015. This KW H.A.S. kit replaces factory springs with height-adjustable, vehicle-specific springs that let you set ride height after installation while maintaining factory damper function.

The KW H.A.S. system is designed for the 2015 BMW M4 to provide continuous, millimeter-precise ride height adjustment without changing the factory adaptive or electronic suspension behavior. KW uses chrome-silicon steel springs with rates matched to the original dampers, and the kit includes elastomer bump stops and dust protection where applicable. That means improved stance and more responsive steering behavior without compromising driver assistance systems or comfort features. Developed and tested by KW in Germany, these springs are built to pair with OEM dampers and fit within the tested lowering range.

Features

• Height-adjustable design allows post-installation ride height tuning
• Vehicle-specific spring rates matched to OEM dampers
• High-strength chrome-silicon steel springs for durability
• Includes bump stops and dust protection elements when applicable
• Maintains full functionality of factory adaptive/electronic suspension
• Manufactured and engineered by KW in Germany; tested for road use

If you have questions or want help choosing the right setup, call us directly — we’re happy to advise. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) to schedule or discuss fitment. If you’re considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov