Hi, you can't guage the actual port from photos, and yes it has a 44mm intake, the intake flows 220cfm @12mm of lift

@@Grooty79 I am seraching for guide for porting m20 heads, i dont know does it make any sense doing it without flow bench? Which intake valve you use, i found some ford valve but need modification. Thanks

@@ivank7668 it can be done by an experienced head porter, not something Ide recommend a novice do, buy some supertech 43mm valves and have a really nice 3-5 angle seat cut, you should be able to get head shop to cut the throat to 88-89% of valve size, blend that into the port and widen the short turn and you will make some power, don't bother looking at pictures of ported heads it will confuse your idea, the roof can be cleaned up but doesn't need any enlargement, you don't need a flow bench as a lot of flow benched heads don't actually make the power they should there just flowing a number

@@Grooty79 Thank you on sharing knowledge. I see you expecting 320hp i only saw that powerful m20 n/a by Robb from Australia. Is the head porting key difference by rest of the builds because most m20 is 220-240hp max.Thanks again

@@ivank7668 Rob is a friend of mine, yes the head is the key to big power, this one should start in a week's time and we're hoping for 350hp , which should translate to 300 rear wheel hp/ 220rwkw anything above this figure will be amazing, there's a few other things that help on a M20 and one of those is getting the quench nice and tight and also running 12mm lift minimum, we're running 13mm of lift and about 260degrees @0.050"