I know that not is good for turbo, catalytic and maybe exhaust valves. I have already upgraded my subaru and got more power than stock, but need installation guide for that bee-r for launch control and lowering rpms if give that car to drive someone other friend or wife. That is bigger problem if found my car crashed on tree. ;)
Edit: If that engine blows up. Then need open and just fix it with better parts. That not my first builded engine, if need to do it. :)