Quote Originally Posted by mgswake View Post
@mjb929rr What is the difference in the 400 and the 450. I am in no way mechanically inclined or versed. I am in the medical field. The dealer seems to think the 400 will be ok with the 1.76 trans. He told me there isn't really a big differnece between the 400 and 450. I won't be getting a 550, but would entertain the 450 if it is needed. Anyone else have any input or suggestions on 400 vs 450? Thanks.

Thank you all for the suggestions so far.
I believe it’s mainly done in the ecm with tuning. It adds about 55ft lbs of torque. I had a 20 sl450 and now a 22sl550. The new sl is balanced different than the old one seems to take more power to get it moving. It’s very similar to the Se in weight, ballast and size and the se comes standard with the 450 for a reason.