If you have a beech you can stc the ram air recovery kit. For any thing else not that I know off. It depends where you are if you in hot weather prop not. But they need to look at your trends 1st. That's a must. If the engine tried your behind it straight up. -34 is a small engine and will suffer more than a -42. It's the same with a king air with -41 as to -42. Same power @850hp but -42 higher itt.