i had a hard time with just a cordless drill and sandstones to grind with. Did you mean the edges of the outer inlet or the cast marks leftover ? this is 50% prpgress btw. i havent finisbed polishing with wet sandpaper and cloth scrub. plus those damn cast marks are hard to scrape of . must need some kind of ultra powerful laser beam to get it of somehow hahaha.That PNP is a bit crude. You did the sharp edges on purpose?
plz reccomend me a technique. it took me almost a whole week for just the intake mani and havent got to the throttlebody. also i just finished removing the 4g13 and assembling the 4g15 soon. jsut that vdo ecu im still hunting -_-
i tought it should have came out kinda like this guy did https://www.revworksinc.com/assets/images/Graphics/Porting/subyheaderported.jpg