Monthly Archives: November 2026

If you've ever driven a GR86 on real roads and felt like the chassis is good but the pavement is working against you, this one's for you. The GR86 is a light, driver-focused car, and choosing GR86 coilover springs changes how it feels more than almost anything else.

So let's walk through how we'd choose between HAL's Low, Medium and High Rebound Speed springs for a GR86 on coilovers, and what to do if you're keeping the factory shocks.

First question: coilovers or factory shocks?

This decides everything.

Keeping the factory shocks? Look at the GROW Design x HALsprings sports springs for the GR86 and BRZ. They were developed specifically to work with the factory GR86 shocks, using HAL's spring design and GROW's experience with OEM damper behavior. The goal was to improve ride quality and control without sacrificing performance.

Running coilovers? Then you're choosing individual HAL metric coilover springs by size, rate and rebound speed. That's what the rest of this post is about.

The biggest

The LC 500 is a different kind of car. It's a grand tourer. People buy it for the design and that naturally aspirated V8, and most owners we talk to don't want to turn it into a track car. They want it to feel a little more special without losing what made them buy it.

So this LC 500 build guide is about subtle, Japanese, and reliable. Let's walk through it.

The biggest takeaway first

On an LC 500, every mod should pass one test: does it make the car better to live with? Coils, exhaust, brakes, then aero. No step here makes the car worse on a long drive.

Step 1: Coils

The LC 500 uses the 2UR V8 family. The HighSpark Lexus V8 kits, Standard and Premium, are listed for the Lexus V8 models. Confirm your exact year on the product page or with Tania or Kenia, since this is a newer platform than the IS F.

Why HighSpark over stock coils? HighSpark rates the spark output at 2 to 2.5 times more powerful than an OEM coil, and they stabilize the voltage coming out of the coil, so the engine runs

GROW Design is one of the brands I get most excited to talk about. Mod in Japan is the exclusive distributor for GROW Design, so this one is personal for us. If you've seen our GR86 at a show, you've seen their work.

Let's talk about who they are, what makes their aero different, and the collaborations that tell you a lot about the brand.

Who is GROW Design?

GROW Design is a Japanese aero brand focused on Toyota GR cars. Their aero is known for looking intentional rather than exaggerated. They enhance the factory lines without overdoing it, and the pieces are designed to look like they could have come from the manufacturer.

The biggest takeaway: factory plus, not over the top

A lot of aero is built to be noticed from across the parking lot. GROW goes the other way. Subtle and clean from a distance, but unmistakably motorsport up close. If you want your car to look finished, not busy or forced, that's their whole philosophy.

The GR86 lineup

For the GR86, the full lineup includes:

• Front Spoiler