switch527 Posted December 20, 2017 Report Share Posted December 20, 2017 Hey guys, Just got back from the dyno after my magnaflow catback was installed and I lost 20hp and 25lbft. Before this I had the catted downpipes, 3 bar, and the livernois tune and it mad 390hp and 450tq. After the catback I'm at 370 and 425....anyone have any ideas on this? I'm not sure where I went wrong here. Quote Link to comment Share on other sites More sharing options...
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