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      11-22-2012, 09:06 PM   #6
knowledge > opinion
redlineryder's Avatar

Drives: '08 e90 335i
Join Date: Mar 2012
Location: London/Toronto

iTrader: (0)

I just did this recently to my car, it's 100% stock with a Cobb PTF pro tune on 94 octane. Tuning made a huge difference, car is very quick for just a software upgrade. Do it, it's the biggest bang for the buck. If you have access to 93 octane or e85 I would suggest getting a protune to get the most out of the stock hardware, then you can decide if you want to spend money on parts to make more power.