Quote:
Originally Posted by ANMVQ
Hmm ok, But you where already tuned with HFC's right? I have the stock cats still. I'm just worried about installing these and not retuning the car from Stock cats to TP's?
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Go get a dyno see the difference, see if you are running lean or if you have a HP drop from last time. if so get a tune (usually retunes are about $150ish). If its a minor drop but your AFR IS still good, get some more mods and retune.