Dears, could some one, please, confirm from witch model this manifold is ? I did some search and think this is from the the n18, that is right ? All n18 models have the same manifold (jcw, Gp and S) ? I have a cooper S n14 and ll do a turbo upgrade, is woth it to change ?

 

I can check the part number against my stock one, but I don't think there is anything better inherently between that and the N14 manifold, both share the same basic shape, sized runners, in/outlets....the desired n18 manifold is rumored to come from the factory and is available https://www.waymotorworks.com/turbo-...5-r56-r57.html

You can however "port" the stock manifold to improve its performance.

 

randeez, thank you very much ! The link is broke, its a picture of the manifold ? So the "good one" is the one that is more square, right ?

 

Correct, but I don't think many have came across a factory installed one...my stock n18 manifold looked just like the one pic in your first post

 

I find this on ebay at a good price, was thinking about to try, but probally ll keep the stock one ... Thanks for the help