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If you want to be "loud as possible" but retain cats, drop the muffler and run custom straight pipes behind. This, however, probably won't be favorable for drone characteristics. But it will be loud.
With the premium prices now for m2 exhausts, for your needs you can easily get a high quality custom built system for cheaper. Just no guarantees regarding sound characteristics since it would be 1 of 1
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M2 LBB/6MT/VFstg2/ V1 stealth/ JRC valve delete/Dinan/
Fabspeed/Wagner/ER/Eibach/UCP/RTD
RA Evo X/WhalenTuned/AMS/ETS/UR/AEM/Swift/RRM/VIS/ID
E46 330ci --> S54 M3 xplant vzv 3bananas (retired) |