Well, since I'm a Tech a BMW, if you ever need an rebuild kit, I get it at cost so, you could save a few bucks.
That I'll have to check.
The only thing though, is that these heads are equipped with vannos and Mr vannos does'nt like to be downshifted, thats why he does'nt live in any M houses.
We've had quit a few engines that lifted the whole vannos, valvetronic,cams, rocker.. assembly after a hard downshift (usually accidental) and THIS, costs really big bucks.