I'm a newbie to the MCS, so bear w/me here for a minute. My experience has been mostly on Chevy muscle/Vette. But the Mini bug bit me w/it's handling! I've been researching the JCW head and saw some pics that showed a somewhat minimal porting/polish job. Would there be any worthwhile gains to be had for a factory JCW MCS to remove the head and do a clean-up on the CNC P&P done by JCW? What about doing an extrude hone & port matching vs. another port and polishing job done by a good vendor shop? Thanks for your feedback.
Larry

 

See if https://www.northamericanmotoring.co...light=jcw+head helps you.

 

Excellent points made both on the extrude hone and polishing. I would still like to see how all these heads compare. And I still don't know if I did another port and polish to my existing JCW head if the results would be significant enough to justify the cost. I probably will not know, unless I remove the head to see what I have or if the pics of the JCW head are representative of their work.Thanks.
Larry