If your on about the Stainless Steel header then i have a 4x4 on my 2wd As for the extra outlet i have used that for my swirl pot But you can just blank it off like you would for a Dump Valve

As for the Above about the turbo water pipe dont worry about that as your hose will fit in the normal place the 4x4 turbo has the hose going around the front of the car and to the turbo on the right hand side Your 2wd comes out over the top of the engine

Heres a pic of my header tank