Hi, yes, we can remove the speed limiter. Our mapping is much different than piggy backs. We adjust right up to the calibration of torque curve while still maintaining a safe table in ignition, boost, fuel table and flow delivery. As far as gapping plugs go, we still have not seen evidence on this, no opinion. We WILL adjust our opinion if issue arises. If you want to replace with a cooler plug or gap around .024 that us perfectly fine. We understand the mechanics of why everyone is asking us to do it. The last thing we would want to do is be blind on the matter. Our mapping is keeping the heat range of stock plugs in good order. We inspected the development car plugs after 400 miles snd saw zero evidence of failure. We are inspecting again most likely at end of next week as car approaches 3k miles with our upgrade