Thread: **BPMSport E9x M3 Performance Engine Tuning Software** - E9x M3 Tuning Leader
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      11-22-2018, 02:39 PM   #974
Sam @ BPM Sport
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Drives: 2012 135i 6MT
Join Date: May 2018
Location: West Los Angeles, CA

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Originally Posted by slowm3sedan View Post
What is the cost to upgrade to stage 2? I have stock exhaust system now, but planning to go full exhaust by summer.
A file revision to upgrade to Stage II would run you about $200 - linked here
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