[pete_z89]

Originally Posted by Gunzaro

There was a test on the 1-series forum for the 135i and it was found the Wagner actually performed worse than all other IC's and marginal compared to stock even.

Here is one that failed http://www.1addicts.com/forums/showthread.php?t=831783

And here is the test: http://mosselmanturbo.com/uploads/me..._Mosselman.pdf

(1) Tests were not on a Z4 = different intercooler
(2) Tests were done by a manufacturer in the competition
(3) The spelling/grammar used in the testing is pretty bad

I wouldn't trust that. But even if I took it as pure 100% accuracy, my Wagner is doing it's job, keeping the temperature less than my stock one did, even when tuned for a higher output.