Bore/Polish
#4
That would actually be referred to as a PORT and POLISH. Do a search on the web and I'm sure you'll find more information than you could go through in a lifetime. ZFP offers ported and polished heads if I am not mistaken.
#6
Originally Posted by THansenite
I am guessing you mean ZPI.
Do a google search and you should be able to find everything you want to know.
Do a google search and you should be able to find everything you want to know.