CUSTOM VALVING AVAILABLE
Sale
CODE:
Categories: TL-ONE
BUILT IN-HOUSE IN POLAND
3-4 WEEK LEAD TIME
- Description
- Shipping and Refund
- Reviews
Built to order. Not sure which spec you need? Spec your build with us →
The TL-ONE Custom Spec is Thunder Lane's bespoke coilover engineering service for platforms outside the standard TL-ONE lineup — hand-assembled in Poland to your car's exact requirements.
Ideal For
- Unsupported platforms not covered by an existing TL-ONE listing
- Builds with modified suspension geometry
- Kits built to a specific rule set (Champcar, SCCA Autocross Street classes, etc.)
How It Works
This is a deposit that secures a bespoke suspension setup tailored to your vehicle's requirements, with final pricing between $2,300–$3,200 based on hardware specifications. After purchase, you'll provide fitment data — vehicle measurements or OEM shock samples (front and rear) for validation testing. Our engineering team uses this to develop a precision-tuned coilover system for your application; all submitted components are returned after evaluation.
Construction & Hardware
Custom Spec kits use the same TL-ONE hardware standards as the rest of the line — 46mm monotubes, advanced piston technology, check valves, and electroplated bodies — configured to your platform's specific requirements.
Frequently Asked Questions
What's the lead time?
Custom Spec builds require fitment validation before production begins, so lead time varies by platform — we'll confirm an estimated timeline once your fitment data is reviewed.
What's the warranty?
6 months — void for track damage, covers unreasonable wear and defects only.
What do I need to provide?
Vehicle measurements, or OEM shock samples (front and rear) for validation testing. All submitted components are returned after evaluation.
Is this streetable?
Yes — every kit can be valved specifically for street use if that's your preference. Even with track-oriented valving, the compliance needed for competent track use often makes for a comfortable street ride, since controlling the platform better also controls body motion better on the street.
Racing Thunder Lane suspension in Time Attack, Hill Climb, or wheel-to-wheel? Ask about product credit through our contingency program.
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.
