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TL-PRO

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TL-PRO is Thunder Lane US’s flagship 3-way adjustable coilover platform for drivers who demand maximum control over chassis balance and tire grip. Built for Time Attack, Hill Climb, Wheel-to-Wheel racing, Autocross, and serious HPDE builds, TL-PRO is designed to give you the tuning range to adapt to track surface, aero load, tire compound, and driving style—without sacrificing consistency.

Every TL-PRO set is hand-assembled to order in Poland and valved around your vehicle and goals. That means you’re not forcing an off-the-shelf baseline to work—you’re starting with a damper package configured for how you actually use the car.

3-Way Adjustment for Real Track Tuning

TL-PRO gives you true, practical adjustability where it matters: rebound plus separate high-speed and low-speed compression. This lets you fine-tune transient response (braking, turn-in, throttle application) while also managing impact events (curbs, bumps, surface transitions) with more precision than a single-adjustable design. If you’re deciding between platforms, this breakdown makes it easy: TL-ONE vs TL-PRO: Choosing the Right Thunder Lane Suspension .

Check Valves & Predictable Separation

TL-PRO incorporates check valve architecture to help keep adjustments doing what they’re supposed to do—reducing unwanted “crosstalk” between circuits so your tuning stays focused, repeatable, and easier to diagnose. Learn what the check valve does and why it matters .

High-End Hardware & Monotube Performance

  • 46mm monotube dampers for consistent performance and heat management
  • Advanced piston technology for stable damping across a wide operating range
  • Check valve architecture to support chassis control while maintaining bump compliance
  • Electroplated damper bodies for durability and long-term corrosion resistance
  • Spherical bearing top hats for precise steering feel and repeatable alignment under load
  • Camber plates included where the application supports them

Built for Motorsports — Validated by Results

Thunder Lane dampers have a track record on competitive cars across Time Attack, Hill Climb, and circuit racing. TL-PRO is built for the driver who wants the extra adjustment range to chase tenths, refine balance across sessions, and dial in a setup as conditions change.

Dyno-Tested, With Graphs Included

Every TL-PRO order includes dyno graphs (CVP and PVP) so you can verify damping behavior and document your setup. It’s the kind of transparency and quality control that matters when you’re tuning a car for real performance. How to Read Shock Dyno Sheets (and what they tell you about real world grip)

Why Choose TL-PRO?

  • 3-way adjustment for serious track-side tuning and broader setup control
  • Made-to-order builds with application-specific configuration
  • Bespoke valving tailored to your goals and use case
  • Premium components designed for durability under high load

Browse the TL-PRO collection below to find the right kit for your chassis — and if you compete, ask about our contingency program that can reward drivers with product credit for participation.