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E90 M335i E90 M335i is offline
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Posts: 140
Join Date: Nov 2014
Car: 09 E90 335i Msport
Default S63TU JB4 + backend flash - 09-22-2020, 08:51 AM

Hi everyone. I have a 14' M6 runing a stage 2 BM3 tune and had a great experience running JB4 on previous cars. Love the features the JB4 gives and the ability to data log and have the monitors so easily. So i was wondering if anybody here is running it with a backend flash and how do they like it (compared to BM3 or other tunes)? If so who's done the backend flash for you?

Thank you for any ideas!
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