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AWD Addict · 04-09-2014, 08:13 AM

So I upgraded from v301 to 403 this week, same tune (sport LT), and it feels identical to the old one.

Is there going to be any meaningful difference? Gas mileage, performance, throttle response etc.?

04-09-2014, 08:13 AM	#8419
AWD Addict Chief Executive 300 Rep 2,886 Posts Drives: 2008 335xi 6spd Coupe Join Date: Dec 2007 Location: Boston iTrader: (1) Garage List 2008 335xi [0.00]	So I upgraded from v301 to 403 this week, same tune (sport LT), and it feels identical to the old one. Is there going to be any meaningful difference? Gas mileage, performance, throttle response etc.?
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