Promini lists the same part number for the regular header on the Cooper and MCS. Is it safe to say that the Turbo manifold they sell for the MCS will fit on my Cooper? A GT28RS will do nicely under the hood. If I get no responses I will just have to get off this contraption and call Supersprint.

 

I don't know the answer to your question, but you do have a battery that could get in the way. Aside from that, be careful. The 10.5:1 compression ratio of the cooper is really too high to take much boost at all.

 

Why wouldn't it? The head casting is the same, along with overall engine dimensions. Can't think of anything else that would matter.

The manifolds currently being used by all the twincharged people would work as well.

 

I'm not worried too much about internals at the moment. And one of my weekend projects is to put the battery in the trunk. 10.5:1 isn't to bad running a turbo. Just can't turn up the boost to engine numbing numbers. I don't plan on staying at that compression ratio for too long.