Poorly Cecil....

[Das Chin]

here is another totally different reading on the Cams in the S54s:

E46 M3: 260/260
E46 M3 CSL: 264/264
Schrick Standard Lift: 280/272, 288/280, 304/296
Schrick High Lift: 288/280, 304/296

now that would make sense as 264 sounds about right and 280 would be way too high for an OEM spec in order to get that level of stable tick over and ability to have a smooth pull through the rev range

If you ware going to do it then go standard lift and 280/272. not too aggressive but a gain at least?

am sure you will lose sth elsewhere at low down but do you really care when its on song. make sure you get it on a dyno to get readings and check all is ok.

your call I guess as its always a trade off.