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I can attest to this Dinan review, recently installed mine on my 6-spd. I was quite impressed by the results too as stated by Barry. The car now is much smoother throughout the entire rev-range and the torque bump is substantial. My previous car was a 335is, and it now feels very similar to that N54 in power delivery. I find that stock, the N20 loses a bit of steam once hitting 3rd gear, but now it pulls strong without any letup. I know the price is much higher than other tunes, but for the gains I saw and a matching factory warranty, I'm very satisfied.
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