The Ultimate Dialled-In Stance Without Losing Adaptive M Control
Unlike conventional lowering springs that fix you into a predetermined drop, the MMX Height Adjustable Spring (HAS) Kit grants you full control over your BMW's ride height. Engineered specifically for the current G8x platform, this kit features threaded perches that let you infinitely fine-tune your front and rear ride heights until you achieve your absolute ideal stance and rake.
By working seamlessly alongside your factory Adaptive M suspension, this HAS solution delivers the height adjustability of a coilover setup at a fraction of the cost, ensuring you retain the sophisticated electronic damping characteristics your M-car came with.
Coilover Adjustability, OEM Ride Comfort
MMX has meticulously developed these progressive-rate sport springs to harmonize perfectly with the S58-powered chassis.
The Perfect Stance: Achieve a generous adjustment range of 20–45mm on the front and 10–35mm at the rear relative to factory ride height.
Progressive Spring Rates: Specially valved to ensure zero sacrifice in daily road comfort during normal travel, while tightening up beautifully under hard cornering.
Sharper Turn-In: Eliminates the floaty feel of the factory front end, making the G8x chassis feel lighter, more direct, and significantly more eager on turn-in.
Premium Engineering: Finished in a signature MMX Metallic Grey powder coat for maximum durability and corrosion resistance.
Technical & Fitment Specifications
Chassis Compatibility: BMW G80 M3, G81 M3 Touring, G82 M4, G83 M4, and G87 M2 (2021-Present)
Drivetrain Support: Fully compatible with both RWD and xDrive variants.
Reversible: 100% bolt-on installation requiring no permanent vehicle modifications—easily returned to standard.
Professional Fitting & Corner Weighting in Stratford-upon-Avon
At String Theory Garage, we specialize in high-performance BMW M chassis dynamics. Installing a HAS kit correctly requires precision adjustment to ensure your car remains balanced and level.
How to book: Select "Collection from String Theory" as your delivery option at checkout. Our specialist alignment team will then reach out to organize a convenient workshop booking for installation and a full chassis geometry optimization.
