I have a b20b with an LS head on it in a EK all motor. And it pulls nicer than my b16 and my LS did. Also, my friend has a b20 w/ a LS head in an eg on boost and he's had that setup for a few months now with no problems. And that thing MOVES. just make sure you get a tune if you boost it. And the LS head makes a big difference as well.