[HCGxKaLiBeR]

depends. 335i with a simple boost tune like JB4, that is instant 100 hp on the crank. cold air intake another 10 - 20 ish hp.
with bolt on like intercooler, downpipes against a stock SS then it should be even if not quicker.

my 335i Convertible stock 5 seconds with the tune and air intake itself already feel faster than my SS...