I used a 2.5"-2.75" 45 degree coupler and a 2.75" to 2.25" straight coupler. Cut the elbow about 3 inches before the weld and trimmed the silicone a bit too. The location of my BPV made it tricky to squeeze in the MAF re-location, it just barely fit. If your not re-locating the MAF then just a 45* 2.5" to 2.25" coupler will work. Remember to take your time measuring and fitting everything into place and everything will be ok. Cut less rather than more, then you can cut again if needed.
Be careful too when threading the brass fittings into the manifold, its easy to strip aluminum. Mine had slight over-spray from the powder coaters on the first couple threads making it hard to get started. Ran a tap through to clean them up. There's no way the stock fuel rail will seal with the original black spacers, so I used the included washers instead. Also cut the rear tabs of the rail to clear the plenum. I'll try to think of more tips for you guys, if anyone has issues don't hesitate to ask, I'm happy to help.
Sorry for the cell phone pics..
One more, just for fun