Interesting that they machined the chamber but not the ports like on their m cars
i would guess it was done to keep the cost down and improved flow wasn't needed to make the 193 advertized hp. i was also told back in 2009 they changed the port size and cams in effort to reduce horsepower as the pre-production models made 15-20hp more. who really knows the actual truth to it all. when Nigel was alive he let me in on a lot of insider info that wasn't discussed.