Originally Posted by Rafstar
Iv'e done the test already. My friend has a n54 with jb4 + intake vs my car which is xdrive +n55 + procede v5 + downpipes. On a 2nd gear pull it's fairly equal but once we get in 3rd gear he has about half a car in front. Bare in mind he doesn't have downpipes. N54 pulls harder than n55 period!!!
Er... If you are in an xDrive (and he is RWD) and he only ahead half a car by the third gear, that would actually mean that N55 pulls harder, not the other way around. xDrive is quite a handicap. On top of that, did you swap drivers and get consistent results?