Keep the adaptive damping. Lose the fender gap.
The A90's factory adaptive suspension is genuinely good — which is the problem with most lowering options. Conventional springs drop the car but leave the electronic damping working against a spring rate it was never calibrated for. Full coilovers replace the system outright, and the OEM adaptive function goes with it.
HKS built the HIPERMAX Touring kit around exactly that tradeoff. It's a height-adjustable spring kit that works with your factory struts and keeps the electronic damping control fully intact — Sport mode still does what Toyota intended, and you gain up to 45mm (about 1.8") of drop that you set yourself rather than accept.
Adjustable, not fixed
The included threaded height adjusters let you dial in ride height instead of living with whatever drop a spring gives you. Front adjusts from -25mm to -45mm, rear from stock down to -50mm. Go aggressive for shows, back it off for steep driveways and track days.
Built for a lowered car, not just a shorter one
Variable-pitch barrel springs (42.6 N/mm front, 116.8 N/mm rear) that control body roll without a harsh initial stroke
HKS-developed rear bump rubber, redesigned specifically for the GR Supra with improved durability at lowered ride height
Optional HKS rear dust boots — the factory boots won't clear this kit
Height adjusters that work with the stock lower spring seat
HKS validated the kit at Gunma Cycling Center — “Gunsai,” the touge-style circuit the Japanese tuning industry uses as a benchmark — with racing driver Manabu Orido.
Install notes
Front bump rubber requires trimming during installation
Packers are required when setting front height past 21mm
Alignment required after installation
Fitment
Fits all MKV A90 / A91 Toyota GR Supra 3.0 models — the factory adaptive damping system is standard on every 3.0 trim. Does not fit 2.0 models.
Why we stock it: these are our top recommendation for anyone who wants a proper drop on an A90 without giving up the electronic damping. As an HKS MASTER Pro Dealer, it’s the kit we point people to most often.