I owned a 2004 supercharged 4.6L SVT Cobra Mustang, bought it new and did some drag racing with back then. It was modded with an aftermarket supercharger pulley that was good for an additional 6 lbs of boost and can tell you that 6 lbs made a massive difference in power, totally different car. If I remember correctly it was over 100 HP and even more TQ compared to stock.
I'm really wondering if 6 lbs of additional turbocharger boost on these 4.4L TT BMW engines would respond as well. Hope so.
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