400ss Posted June 3, 2010 Report Share Posted June 3, 2010 i have a 5.3 engine on my truck with a 3" inlet 3"outlet single chamber flowmaster i lost some power becouse of that. will i lose more power if i take the cats off i want it to sound loud but not lose power Quote Link to comment Share on other sites More sharing options...
zachm89 Posted June 3, 2010 Report Share Posted June 3, 2010 you could always go with some hiflow cats...but then again the flowcrapper is probably the main cause of the loss of power. Quote Link to comment Share on other sites More sharing options...
gmcsierragt Posted June 4, 2010 Report Share Posted June 4, 2010 I just got some magnaflow cats and im happy with them, I had my cats eliminated for like 3 weeks and I couldnt get the check engine light to stay off Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted June 4, 2010 Report Share Posted June 4, 2010 I just got some magnaflow cats and im happy with them, I had my cats eliminated for like 3 weeks and I couldnt get the check engine light to stay off Thats because you need a tune when you do that..... Quote Link to comment Share on other sites More sharing options...
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