Quote:
Originally Posted by steven32708
would you have to get a tune if you completely remove the cats. because removing the cats completely is a lot cheaper than getting high flow cats.
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Yes. your going to throw a code. The post O2 sensor becomes more active without cats if you look at a tec 2. I've seen when the cats burn up and break in piecies and end up in the muffler. The post O2 and pre O2 have the same activity or ......cross counts. The post O2 with cats are always slower then the Pre O2 sensor. hope this makes sense to you. I'm not sure what your loosing when removing cats and having a tune if any. gas milage? Your gaining little more horsepower but not sure what else the advantage if any.