While I have heard plenty of horror stories about the grendel I have experienced none. Having said that the rifle I built is fairly new. I have maybe 300 flawless rounds down range and I love it.
They race on the street..That's street racing. You could bring a full boat drag car if you want but you have to be able to put the power down which is the real trick
And plug wires. I have found over the years driving Toyota and Hondas that plug wires will go bad and cause misses on certain cylinders and ruin fine one things warmed up.I'm not saying that's it for sure but it does happen.