The existing rear and front ones. Although there were plenty of tread left on all four tyres, ...
After installing this on all four corners, I covered over 8,000miles and the rears are about 1mm to go before starting to hit the wear limit. As my chassis setup is quite different and while I don’t accelerate hard (WOT in lower gears), I do use really hard braking so my comment may not be the same for your setup and driving condition. For OEM wheels, even with the today’s latest technology, I still felt the OEM NSX specific tyres suited ...