1 Select Make
2 Select Model
3 Select Chassis Code
Search Reset

TL-HAS

FilterAll 0 results
Sort by Best selling

TL-HAS (Coming Soon) is Thunder Lane US’s height-adjustable spring conversion system designed for drivers who want a lower, more purposeful stance and improved handling balance—while continuing to run OEM dampers. If you like how your factory shocks drive but want more control over ride height and corner balance, TL-HAS delivers a clean, track-minded solution without committing to a full coilover package.

TL-HAS is being developed for select platforms, including non-GT3 Porsche 991 & 992 911 models and BMW F- and G-chassis M2, M3, and M4. Each kit is built around Thunder Lane’s performance-first approach: precise fitment, durable hardware, and adjustment that’s meant to be used—not just advertised.

What TL-HAS Does

TL-HAS replaces the fixed OEM spring setup with a threaded height-adjustable perch and matched springs, allowing you to dial in ride height to suit your wheel/tire package, alignment targets, and intended use. It’s ideal for drivers who want improved aesthetics and sharper response, while keeping the refinement and everyday usability of factory damping.

Why Height Adjustability Matters

  • Better stance, done right — set ride height with proper spring seating and adjustment range
  • Sharper handling feel — reduce excess ride height and improve platform control for spirited driving
  • More setup flexibility — tune around tire sizes, aero, and alignment goals
  • OEM damper compatibility — keep factory shocks while upgrading the spring/ride height interface

Built for Drivers Who Care About Setup

TL-HAS is for the owner who wants the car to feel more connected and more deliberate, without turning it into a harsh, over-sprung street build. Expect a solution that prioritizes fitment accuracy, durability, and repeatable adjustment—whether your goal is a cleaner street setup or a better baseline for occasional track days.

Target Applications

  • Porsche 911 (991 / 992, non-GT3)
  • BMW M2 / M3 / M4 (F & G chassis)

TL-HAS is coming soon. Follow along for release updates, and check back as we finalize the initial application list and technical details.