I am rebuilding my XE and need a new cylinder head, is it worth getting a Coscast head?
We would normally advise the use of a Cosworth head casting. Simply because we know they don't have a problem with porosity. There are actually only a few cylinder head castings of the normal Carl Schmidt version that have become porous. The only problem is that many of these are dumped onto the second hand market and the same head castings get recirculated, so it looks like there are more than there actually are. Although you can have the cylinder head tubed and many companies are now claiming to be very successful, it's the aggravation of getting it done and if it ever does become porous again, you have got to take the whole head apart again.