So does anyone make a test pipe with a resonator on it? That would provide 4x resonators plus the secondary cat to keep noise down but free up power. Also keeps smell at bay.
Let me know if this exists or if anyone made something custom.
Thanks
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09 Space Gray E90 M3 DCT: BPM (Stage 1, DCT and Servotronic) tune, Gintani Sport Exhaust, Dinan Intake
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