BMW G8X M2/M3/M4 TL-One Coilover System

Thunder Lane TL-ONE Coilover System

BMW G87 M2 | G80/G81 M3 | G82/G83 M4

The Thunder Lane TL-ONE Coilover System is a track-focused, single-adjustable suspension system engineered for the BMW G8X M2, M3, and M4 platforms. Hand-assembled in Poland and bespoke-valved to match your tires, aerodynamic setup, and available grip, the TL-ONE is designed for enthusiasts pushing their cars at HPDE events, autocross, time attack, and wheel-to-wheel competition.

With a 46mm monotube damper, digressive valving, and 20-click rebound adjustment, the TL-ONE delivers precise chassis control, consistent handling, and customizable suspension performance. Its modular design and independent ride-height and travel adjustments allow you to fine-tune your setup without compromising suspension geometry or usable travel.

Engineered for Track Performance. Tuned for the Street.

The G8X platform's substantial power and weight demand a suspension system that maintains composure under hard braking, through high-speed corners, and during aggressive acceleration. The TL-ONE's carefully developed damping characteristics help manage body motion and deliver a more predictable, balanced driving experience.

Each kit can be custom-valved for your intended application, including street driving and dedicated track use. With the appropriate spring rates and damping setup, you can tailor the balance between ride comfort, tire compliance, and precise chassis response.

Technical Specifications

• 46mm monotube dampers with advanced piston technology and check valves

• 20-click rebound adjustment for precise damping control

• Digressive valving for responsive chassis control

• Independent ride-height and suspension-travel adjustment

• Dual-height-adjustable design for greater setup flexibility

• 2.5-inch linear springs with customizable spring rates

• Optional Swift performance springs

• Spherical bearing top mounts for precise suspension response

• CVP and PVP dyno graphs included with every kit

• Rebuildable and serviceable dampers

Construction & Hardware

Designed for demanding driving conditions, the TL-ONE features electroplated damper bodies for corrosion resistance and precision spherical-bearing top mounts to support accurate suspension geometry under load.

The modular construction allows individual components to be serviced or upgraded as your setup evolves, making the TL-ONE a versatile foundation for both developing track cars and dedicated competition builds.

Suspension Configuration

• Aluminum front camber top hats

• OEM top-hat adapter option

• Rear top mounts available in rubber or pillowball configurations

• Stiffer rear top-mount options

• Adjustable front and rear lower mounts

• Adjustable end links

• Modular suspension architecture

Standard Spring Rates

• Front: 10 kg/mm

• Rear: 14 kg/mm

Custom spring rates and damping specifications are available to suit your vehicle configuration, tire compound, aerodynamic package, and driving goals.

Vehicle Fitment

• BMW M2 (G87)

• BMW M3 Sedan (G80)

• BMW M3 Touring (G81)

• BMW M4 Coupe (G82)

• BMW M4 Convertible (G83)

Built for Drivers Who Demand More

From weekend HPDE sessions to competitive time attack builds, the Thunder Lane TL-ONE Coilover System provides the adjustability, serviceability, and bespoke tuning potential to help unlock your BMW's handling capabilities.

P1 Motor Werke — By Enthusiasts, For Enthusiasts.