Two months on my MHD Stage 1. Couldn't be happier... Smooth response but noticeably peppier car.
I have the m-performance muffler, so a slight 0.3 sec burble was a nice addition.
I recommend keeping the cold start revs stock. My manual car stalled several times, this is the only thing that I changed when I retuned.
Haven't logged anything yet, no seeming issues.
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