Yeah I have a GFB Stealth and when I have it set to full atmo, it's nearly loud enough to wake the dead I love it, but it just screams to cops, "DEFECT ME!" so only turn it to atmo now and again, mainly have it set to plumback
Oh and not only can you use the SAFC/SAFC2, but also using a Power-FC fixes this, basically any form of aftermarket ECU/piggy back ECU that tunes fuel should be able to fix it up.