3.5" maf on 3" inlet pipe

Will this work? Need something that flows enough for 400 whp. I have a cobb SF currently which is 2.75". It came with a 3" silicone reducer which goes down to stock k04 size. I read that it does flow better than stock:


My inlet pipe is CPE 4" that reduces to 3". My question is what will the cobb sf max out at? And If I need a bigger maf housing will a 3.5" work? Or does it have to be 3"? I'd like 3.5" so I could upgrade the inlet pipe in the future. Looking at this https://performancemrp.com/i-304976...s-air-flow-housing-with-air-straightener.html or possible others like JBR 3.5"..

According to Nishan's vid on intake sizing.
Stock sized intake max 340-350hp because max is 5 volts. But ecu will limit to 4.92 v because it needs to do diagnostics and other functions

3” 450 hp

3.5” 650hp

4” 800hp
Will a 3.5" MAF on a 3" inlet pipe still behave as 3"?

 

What are you actually trying to do? Stock turbo? Leave it alone don't waste money on parts or redoing a maf cal. New turbo? Just get the appropriately sized intake when you get the bigger turbo and be done with it.
A 3.5" maf will have to be calibrated accordingly but choke point will still be 3" intake and if you increase the intake size your best bet would be to re do the MAF cal as the intake will flow differently. Plus if you swap turbos you're re tuning anyway.