I wanna say I've done around 145ish but that was a while ago with my ls on nitrous - think on my current setup I've gone about 130 down the highway but I don't like to do that anymore
...and now we know that you are all reckless bastards.
142 for me, before my car was built, so it took forever to get up there. Now it takes seconds, but I don't go fast on the streets anymore and I recommend you guys don't either!