it will be significant power increase if your car equipped with N51 with 3 stage intake manifold, 20 more@ low 2750rpm torque can be enabled by simple flash, it feels like adding a small turbo.
check under your hood for "SULEV" if you got that your car has N51, if "ULEV" then nevermind.
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N51- PI - PE - ESS Tuned - SSK - CDV Delete - AFE Header - B12 - Mfactory LSD
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