As the owner of a 2011 135i let me say, “Yes we did need it”. The only 3 series that rides or hldanes as agressively is the M3. For $10000 less than a basic 335 I get all of the benefits and a 4.6 sec 0 to 60 (that is a real time, not a factory estimate). Did I also mention that is completely stock!
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