Well it hasn't been easy but I think I got it done. I can't try and start it until the fuel rails and Zone 5 stage 1 FPDM show up. I still need a couple more t-bolt clamps too.
I went with a 12" piece of 4" straight pipe in front and in back of the MAF. I was told by a reputable tuner as long as I did this that I would not lose any range by going blow through. The straight pieces go into reducing elbows for a slow transition from 3 to 4 inches.
I know it's a little ghetto, but so is most of the stuff I do lol.
Here's a few pics
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