and my results on the M370 today were pretty lackluster at this point, so I would say pulleys.
I was above the curve on torque and hp in some places and below others, but never really had probably more than 2-3 hp or lbft difference in the before and after today at Z1. I'm gonna have the car retuned there after my next track day and we'll see if that makes any difference, but at this point, I'm not too impressed with it. The only benefit is it reduced the drone at 2800 rpms. Other than the M370, I have Gen 3s, test pipes and invidia with a Z1 tune.
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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968
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