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Stock 335i's do the 1/4 in 13.5 or so.
Stock 135i's do the 1/4 in 13.3 or so.
If you tune/chip the N54 bi-turbo engine you will probably have problems. And BMW is doing ALOT with comp programs to find out if the car has been chipped. I was 99.9% SURE I was getting a mostly loaded 135i manual next spring. BUT after reading many problems with the HP fuel pumps among other problems, I decided to get an SS/RS LS3 instead.
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