any car coming outta the factory comes wit a tolerence of +-5%, good luck on whoever dat will get the -5%, lol.
personally, imo, the worse quality / tolerence engine pun shudnt be dat bad, or else better not sell anything lah.. my engine has never given me any problem, even after 6years / 300k km of hard boosting. it will be a long time when iam putting any faith on the campro, i prefer magma, megavalve, be it old tech but its more reliable. i know a saga wit a very old megavalve and its still running originally (havent been overhauled) fine, dats a relic old engine kot!!!