TL-ONE Thunder Lane Track Performance 1-Way Adjustable Coilover Kit for Mazda MX-5 Miata (NA / NB)

Built to order, valved for your NA/NB Miata. TL-ONE is a track-focused coilover kit designed for real grip, usable travel, and repeatable damping on autocross, HPDE, time attack, and wheel-to-wheel builds.

Hand-assembled per order in Poland using top-tier internal hardware (check valves + advanced piston design). Before anything is built, we’ll reach out to confirm your goals, tire size, ride height target, spring rate preference, aero (if any), and typical track surface so we can match a valving profile to your chassis and driving style.

Why TL-ONE for NA/NB Miata?

The NA/NB platform rewards momentum and mechanical grip—but it also punishes dampers that waste travel. Many off-the-shelf kits feel “stiff” without staying composed over curbing, bumps, or transitions. TL-ONE is engineered to deliver more effective bump travel and controlled motion so you can run the ride height you want without giving away compliance.

Result: better platform support under braking/turn-in, improved mid-corner grip, and a calmer car over rough sections—especially on 200TW tires and aggressive alignment.

What’s Included (TL-ONE 1-Way Adjustable Kit)

• 46mm monotube dampers for consistent performance under heat
• Electroplated damper bodies for durability and corrosion resistance
• Fixed-length bodies (reduced “dead space” vs. many sleeve-style kits)
• 20-click adjustment (rebound-focused tuning; build-dependent optioning available)
• Spherical bearing / pillowball top mounts for precise steering and repeatability
• Dyno graphs included (CVP & PVP) with every set
• Rebuildable + serviceable monotube design

Valving & Customization Options

• Custom valving matched to spring rates, tire grip, and intended use
• Spring rate guidance for street/track balance, autocross response, or time attack support
• Ride height targets set around your goals (travel-focused, not just “low”)
• Top mount configuration and hardware spec’d per chassis needs

Upgradeable to 3-Way Remote Reservoir

Plan to step up later? TL-ONE can be upgraded to a 3-way remote reservoir configuration with low-speed and high-speed compression adjustment for maximum tuning range on slicks, aero, or rough tracks.

Best For

• Autocross (fast response without skating over bumps)
• HPDE / Track Days (temperature stability + composure)
• Time Attack (support for wider tires + aggressive alignment)
• Hill Climb and mixed-surface tracks

Frequently Asked Questions

Does this fit both NA and NB Miata?

Yes—this listing is specifically for NA (1989–1997) and NB (1999–2005) Mazda MX-5 Miata fitment.

What info do you need to build my kit?

We’ll confirm use case, tires, ride height target, spring preference, alignment goals, and any aero so your kit is valved to match.

Are TL-ONE dampers rebuildable?

Yes. TL-ONE monotubes are fully rebuildable and serviceable.

Do you include dyno sheets?

Yes—every set ships with CVP and PVP dyno graphs.