I would go with the Skunk 2, unless your going to add a turbo. You might have to wait cause Skunk 2 is backordered on just bout everything. If you do decide to go with Skunk 2, you will have to make a few modifications. On the oem manifold there is a bung for your absolute manifodl temp sensor (I think) that is missing form the skunk 2 one. I spliced a t valve bettween the manifold and the pcv valve, and piped it there. There is also 2 ports on the backside we didn't know what were for. One of them is on the right side which we capped. The other is an extra flange off the coolant line.