CUSTOM VALVING AVAILABLE
Sale
Thunder Lane
Porsche 911 (991/992) TL-HAS Height Adjustable Spring Kit
$1,775.00
In Stock
Pre-Order
Sold out
CODE: TL-HAS-PORSCHE-911
Categories: Featured Builds, Porsche, TL-HAS
BUILT IN-HOUSE IN POLAND
4-6 WEEK LEAD TIME
- Description
- Shipping and Refund
- Reviews
Built to order. Not sure which spec you need? Spec your build with us →
The Porsche 911 (991/992) TL-HAS Height Adjustable Spring Kit is Thunder Lane's height-adjustable spring system for the 991 and 992 generation 911 — hand-assembled in Poland and built to order, letting you dial in ride height on your factory dampers without moving to a full coilover.
Ryan Lohrman's 992 Carrera #91 at NCCAR (photo: Rogo Photo)
On track
A 992 Carrera on TL-HAS at NCCAR
Ryan Lohrman runs his 992 Carrera #91 on TL-HAS springs and Thunder Lane camber plates at Hooked On Driving track days at NCCAR. The factory dampers stay in the car.
How it works
Height-adjustable springs on your factory dampers
TL-HAS fits height-adjustable springs to the dampers the car came with. Front and rear ride height adjust independently: 15–35mm lower at the front and 20–40mm at the rear, so the car can be set where you want it and then corner balanced.
Hooked On Driving, NCCAR (photo: Rogo Photo)
Factory suspension stays
PASM keeps working
TL-HAS works with the factory suspension, including electronic damping control (PASM), on 2WD and 4WD 991 and 992 cars. You keep the damping modes the car came with.
Photo: Rogo Photo
Built to order
Spring rates settled with you first
Every kit is hand-assembled in Poland to order. Spring rates are finalized with you before production begins, based on the car and how you use it.
Height Adjustable, Factory-Damper Friendly
TL-HAS lowers the car and lets you set front and rear ride height independently, while keeping the factory suspension — including electronic damping control — fully active. It's the clean way to get a corner-balanced stance and improved handling on a car you want to keep largely OEM.
Technical Specs
- Front lowering range 15–35mm; rear lowering range 20–40mm
- Works with factory suspension, including electronic damping control (PASM)
- Tailored spring travel for improved handling and stance
- Independent front and rear ride-height adjustment
- Spring rates finalized in consultation with you before production begins
Fitment
Porsche 911 (991 and 992), 2WD and 4WD, including Carrera S 2WD.
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 PASM and factory suspension features?
Yes — TL-HAS works with the factory suspension, and electronic damping control (PASM) remains fully active.
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 Porsche 911 height-adjustable springs guide.
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.
Not sure which spec you need?
Every set is valved for one car and one driver. Send a short brief and we'll come back within 24 hours with a spring rate range and a valving direction for your setup. Free, no commitment.
Support after your set arrives
At the track
At-track support and coaching
Anthony can join you at an event, drive or ride along in your car, and help you set it up.
Request track support →In Raleigh, North Carolina
Install, corner balancing and alignment
Offered by Rob Keehner at Beaver Marsh Calibration. Rob has been racing and building race cars for over 20 years.
Request install or alignment →
