Jack.16 Posted 7April, 2015 Report Share Posted 7April, 2015 So, l'm going to be purchasing a cat bypass for my 1985 carrera (don't have cats), however I have a 86 motor in the car (which comes with a cat). Would l loose power if l go with a cat bypass? Should l go for the pre-muffler? Noise/pollution doesn't matter, just don't know which one l should go for. Thanks Link to comment Share on other sites More sharing options...
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