theyre just not good at staying in one bit to be honest, a few years back there was a patch where the gen wrc gaskets dried up, five engines were done with cometic and all came back for a wrc upgrade

the bastos car you may know, escort cosworth track car had a cometic, he had problems and two engines just on the dyno by another tuner just had problems, so from what i see with my own eyes they are shite