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So to pass emissions, I put the cats back on. They just killed spool and the car felt less responsive. It was enough for me to notice especially going WOT and if you caliberate your butt dyno correctly, you can tell the power comes on slower and less abrut. Also from my past dynos, I see that I gained very litte peak horsepower from the test pipes, but the area under of the curve has increased dramtically because turbos spool sonner.
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