Had a few good pulls with a guy who had a newish mustang with exhaust and intake
My setup:
08 135i 6mt
Dinan s2 flash
Jb+ at 75%
Dci
Dinan cat back
E30

I had a trunk full of groceries and 2 cases of water, he had a female passenger

1st run 60-120 I pulled 3-4 cars
2nd run from stop he pulled about 4 cars to 70 or so, caught up around 100, 3 cars ahead by about 130
Last run 50-120 : 3 or 4 cars yet again
All in all he destroyed me launching but everytime 3rd gear and up i walked pretty hard

It was a good race and he was a super nice guy. We talked after and he was asking what I had done