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Thunder Lane
BMW G8X M2/M3/M4 TL-HAS Height Adjustable Spring Kit
$1,200.00
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- Description
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Built to order. Not sure which spec you need? Spec your build with us →
The BMW G8X M2/M3/M4 TL-HAS Height Adjustable Spring Kit is Thunder Lane's height-adjustable spring system for the G8X M2, M3 and M4 — hand-assembled in Poland and built to order, letting you dial in ride height on your factory dampers without moving to a full coilover.
Height Adjustable, Factory-Damper Friendly
TL-HAS lowers the car and lets you set front and rear ride height independently, while keeping the factory adaptive damping and every driver-assistance and comfort feature fully operational. It's the clean way to get a corner-balanced stance and sharper response on a car you want to keep largely OEM.
Technical Specs
- Front lowering range 20–50mm; rear lowering range 0–45mm
- Compatible with standard and Adaptive M factory EDC dampers
- Optimized spring rates for improved steering response and dynamics
- Independent front and rear ride-height adjustment
- All factory adaptive/electronic suspension and comfort features remain operational
- Spring rates finalized in consultation with you before production begins
Fitment
BMW G87 M2, G80 M3 Sedan (RWD and xDrive, including Competition), and G82 M4 Coupe (RWD and xDrive, including Competition).
Frequently Asked Questions
What's the lead time?
4–6 weeks, built to order.
What's the warranty?
6 months — void for track damage, covers unreasonable wear and defects only.
Does it keep my adaptive dampers and driver aids?
Yes — TL-HAS works with your factory EDC dampers, and all adaptive suspension, driver-assistance, and comfort features remain operational.
Can I set the ride height myself?
Yes — front and rear ride height adjust independently so you can dial in your exact stance and corner balance.
Racing Thunder Lane suspension in Time Attack, Hill Climb, or wheel-to-wheel? Ask about product credit through our contingency program.
Want the full breakdown for your chassis? Read the guide to lowering your G8X without losing adaptive dampers.
Not sure which spec you need?
Tell us the chassis, how the car is built, and how you use it. We spec the kit before anything is assembled.
Spec your build with usWe build every suspension set to order and want you to know exactly what to expect from checkout to delivery.
Build Lead Time (Made-to-Order)
Because every set is machined and assembled for one specific car, most orders require a 4–6 week lead time to machine hardware and complete assembly.
Every set is built 100% in-house in Kraków, Poland—no outsourced assembly, no pre-built inventory.
Shipping Time to the United States
Once your order is complete and ready to dispatch, typical shipping time to the U.S. is 5–10 business days.
Transit time can vary slightly depending on carrier, customs processing, and your location.
Where We Ship
We currently ship to the United States, Canada, Mexico, and Central America, with free shipping to every destination we serve.
Order Processing & Tracking
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You’ll receive a confirmation email after placing your order.
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We’ll reach out to confirm your build spec—spring rates, valving, and ride height—before production begins.
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When your order ships, you’ll receive an email with tracking information.
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If your order includes multiple items, they may ship together or separately depending on production status.
Important Notes
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Lead times are estimates and may change based on current workload, parts availability, or production volume.
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Business days do not include weekends or holidays.
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International shipments may experience customs-related delays outside of our control.
Need Help?
If you have a deadline (event, track day, or travel schedule) or want an update on your order, contact us and we’ll do our best to help you plan accordingly.
