Ok guys and Gals. I'm looking for information and/or opinions. I'm going to have a used Cooper S turbo rebuilt. It's going to be a hybrid rebuild. (It includes the K04 compressor wheel, high flow turbine wheel, HP 360 rebuild and all machining/balancing to perform the upgrade). When I get this done I'm also going to replace the Exhaust Manifold. I have 2 manifolds at my disposal, A used cooper S manifold and a new JCW tuning kit manifold. What I'm wondering is if I get the Cooper S manifold ported and ceramic coated will it be better than the JCW manifold? And is there any advantage to porting the JCW manifold? The reason I ask is I have heard reports a ported Cooper S manifold flow more than the JCW Manifold. But what I don't know is if this comparing 2 ported manifolds or if its just the Cooper S manifold is ported and JCW is not. Also I don't know if the JCW CAN be ported, as in its already maxed out? So what do people think? Ported Cooper S Manifold or JCW Manifold? Here are some pics to show the difference between the two manifolds. Dirty/used manifold = Cooper S manifold, Clean/new manifold = JCW tuning kit manifold.