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BMW might be using different DME's in different build times. I vbox and drag strip tested 2 different RaceChip modules directly from RaceChip on a n63tu. Zero gains on any level in eithert module. Sent both back. Money refunded.
Tried the BMS jb1 Maf intercepts and it worked great. Vbox and strip gains.
Also using RaceChip on my S63tu with great results so no bias here.
Know others that tried RaceChip on n63tu with zero gain.
N63tu is an odd duck.
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