the computer only reads if they use a snifferok that is gana sound like ****, and a dubm idea imo. i highly dought that u will get evry part of the cat out so hence the shity sound, it will ratle like hell.
also they test emistions with a computer and it will read that the cats r not doing there job, so u will fail.
and finaly i took all mine off then put high flow one in. i got $110 for my stock cats. that was about the same as my high flow ones cost, so other then the install u will justabout brake even, and have better praforming, sounding, and legal set up.