$595.00 USD
$595.00 USD


















Unlike conventional fixed-drop lowering springs, the MMX Height Adjustable Sport Spring Kit (HAS) gives you a fully customizable ride height across the full range of factory G-chassis M-Cars. The kit is engineered specifically for the G80 M3, G81 M3 Touring, G82 M4, G83 M4 Convertible and G87 M2, covering the full G8X family in a single product.
The adjustable design pairs MMX-developed sport springs with billet height-adjustment hardware, giving you 20-45mm of lowering range at the front and 10-35mm at the rear versus factory ride height. That means whether you want a subtle daily-driver drop or an aggressive track-day stance, you can dial it in without buying a different spring set.
Front and rear are independently adjustable, so you can fine-tune corner balance and rake to your exact preference. The sport-rate springs improve dynamic response over the OE setup (sharper turn-in, less roll, more direct mid-corner feedback) while remaining fully compatible with both static and Adaptive M dampers.
The end result is a single suspension upgrade that adapts to how you drive: lifted slightly for daily use and clearance, or dropped fully for a planted track-day stance, without the cost or complexity of a full coilover setup.
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.