I have only raced ITR once with my SR20 S14. I gota say those ITR are pretty impressive with just simple bolt ons. I have basic bolt ons and I was running at stock boost and type r hung with me up to around 90 mph. I only had him by less than a car length when we reached 100... Just FYI my SR is from an S14 so it has around 15 more hp than S13 SRs.