We've gotten backfire on nearly every Raptor we built after installing AFE CAI's. Most of them only had backfiring after refueling. We did have one customers truck that backfired non-stop and turns out that the throttle body went bad. Mods on that one were AFE CAI, AFE Scorcher and Pedal...
Installed the ATAK system - loved it for about a day, then it drove me nuts. Added the Borla resonator as someone mentioned in this thread and now it sounds perfect. Louder than stock, deep tone, no drone at all. Sore about the price of putting all that together - but worth it. Downpipes next...
I put on the ATAK kit, liked it for about a day, then it drove me nuts. Just installed the Borla resonator (removing the Borla X pipe) and SPD adapters and it sounds perfect. No drone. No raspyness. Super happy with it now, but still a little sore about buying the entire ATAK system, then not...
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