Hi I have an E30 head that has had the larger valve seats fitted and a new set of guides and been cleaned up ready to be fitted out. It has a 37cc chamber volume. It's bare otherwise but I do have the cam towers for it and the top side has been cleaned up at the workshop. I also have a full set of new valves for it. The exhaust are 33mm and the intake are 42mm. It's a high quench head and if installed with flat tops and a 1mm gasket would give you compression in the 11:1 range. I don't need it now as I am fitting a turbo and using a pretty stock N42 head. I have the receipts for it to show that I spent $1,400 on this head. If you are interested make me an offer. Cheers. Andy