119mm of titanium, and a Supra that finally sounds like one.
The B58 makes a genuinely good noise. The factory exhaust just does not let much of it out. The HKS Dual Exhaust is the direct fix — a full cat-back in SUS304 stainless running 70mm twin main pipes into 119mm (4.69") titanium dual tips that fill the rear valance the way the A90’s styling always implied they should.
Volume you can still switch off
It uses the stock actuator and control, so the factory exhaust valve keeps working exactly as it does now. Normal mode stays civil for the commute; Sport opens it up. In Sport, HKS measures 90dB against the stock system’s 88dB, with idle at 66dB versus 58dB stock — noticeably more presence, especially on cold start and at low rpm, without the car becoming something you regret in traffic.
Specifications
Muffler / tip style: titanium dual tip
Tip diameter: 119mm (4.69")
Center pipe diameter: 85mm (3.35")
Main pipe diameter: 70mm x 2 (2.76")
Main material: SUS304 stainless steel
Noise level: 90dB / idle 66dB (Sport mode)
Stock noise level: 88dB / idle 58dB (Sport mode)
Fitment
Fits MKV A90 / A91 Toyota GR Supra 2020+, non-OPF models. Not compatible with the 2026 Final Edition.
Choosing between this and the Super Turbo Muffler: take the Dual for the larger 119mm tips and the extra volume. Take the Super Turbo if you are running a catless downpipe or want the quietest HKS option — it is around 5dB quieter at idle. As an HKS MASTER Pro Dealer we stock both, and we are happy to talk it through before you buy.