Would have been nice if you did a rolling road first, then the intake, then the rolling road again, then the ....
It have more or less been proven that changing the intake does next to nothing. The problem with the M113 is the
exhaust! As in, headers and mods to the first part of the exhaust is what gives the most. That alone, without any tune/remap, gives about 40-50hp! Then a tune on top of that, another 20-40hp.
And when you see what it looks like underneath, you'll understand why

. I still can't figure out what MB/AMG was thinking!! Or maybe that was the problem, they
wheren't thinking!