darksnake Posted November 18, 2010 Report Share Posted November 18, 2010 On my...2008 GT500 with JLT CAI, diablio tuner, 2.6" SC pulley, IW oversized crank pulley, FRPP TB twin 63.5mm, Corsa sport mufflers, aluminum driveshaft, & Dynojet dyno tuned @ 16# boost & 557 rwhp, 595 rwtorque. If I replace stock mid-pipe & cats with smaller/reduced cats mid pipe (less back pressure)...... Will I need to have car re-tuned/dynoed to run properly, or will on board computer re-learn/adjust for reduced back pressure?? Link to comment Share on other sites More sharing options...
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