Piker Porting (Intake Manifolds)

The thread was created in hopes that others would post about whatever intake they have/had and what they did to it, tools they used etc. Very scant sharing, likely widespread reluctance to. RB gave me some useful insight and opinions that has me looking into some other areas I wasn’t considering (was going 40 grit finish, now looking into the texture) but anything more from me is limited as I don’t have a flow bench so that leaves me out of any further continuing discussion. :)

I'd like to see pics if you do the rasp finish. I might go buy a couple. Flobench or nobench, I'm interested.