Having had over 40 Yarii' through our doors here at String Theory we've had a chance to see and hear pretty much every aftermarket exhaust option out there. Of them all, the only one that we are happy to offer our customers, both from how it sounds and the quality of the product, is the HKS Legamax Premium.
Fairly subtle and not droney when at a cruise, only when you open the throttle does the improved sound become evident, and even then it still has tone and is not overbearing, unlike a lot of farty aftermarket options.
Made from S304 stainless steel and now with a black exhaust tips with an ion plated corrosion inhibitor, these are a really high quality manufactured product of the level that you would expect from a true JDM component.
You can see more details and hear the exhaust in action at the below link:
Lead time usually 2-4 weeks, please enquire at point of order for a more accurate estimate.
We can also fit this exhaust for you at our workshop in Stratford-upon-Avon - please get in touch to get booked in.
International shipping possible - please get in touch for a quote.