Thanks FP! I'm using 3" silicone pipe from:
Intercooler Pipe Fabrication - Silicone Intake Systems Auto Parts
To get a cleaner pass through, I actually notched the pipe to fit around the radiator. I probably pick up a little unwanted heat by doing this but I hope the added flow more than compensates for this.

This is connected to an MB air box from TVT. Air box will be back from paint next week and I'll post more pics then.