Update. Tried an E85 mix and the car is even more powerful now and the shitty smell from the catless DPs is gone!. My tuner advised me on the mix and the temps are cooler now and the car makes more power. According to him it gained another 30whp on the other M5s he did and it sure feels like it!
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16 SMB M6 Gran Coupe
16 BS X6 X-line (wife's truck)
13 AW M5 (sold)
04 Honda Pilot (everyday car)
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