If you have a 3 inch system you will need to get what they call their "bullet" cats, the regular shaped ones will not fit a 3 inch system. The bullets run about $350 a set. They also make a combonation cats and test pipes for the ZX in a 2.5 inch. Sorry, I don't know the price on them. This is a pic of the bullets installed on my Z, the test pipes are SGP's, not Random Tech.
Fred 95 300TT SGP Stage..Who knows..lol Dynoed 539.4 RWHP, 481.2 Lbs. Torque Pump Gas @ 17 Lbs. of Boost NO NOS!!