In fact they are some of the best sized turbos for a stock motor configuration you can buy. The other is a 28/25 setup. With the other basic bolt ons and 555 injectors you can get 430+ RWHP EASILY with the 500s. You obviously have never been in a well tuned PROPERLY setup Z with 500s, otherwise you would never say such a uniformed statement
Fred 95 300TT SGP Stage..Who knows..lol Dynoed 539.4 RWHP, 481.2 Lbs. Torque Pump Gas @ 17 Lbs. of Boost NO NOS!!