| [ http://www.ztechz.net/id1.html ] So to add a few to that list: Turbo name........Turbine side/Compressor side Stock turbos.................T22/T2 T25.............................T25/T25 Sport 500.....................T25/T25 (guess) T28.............................T25/T3 (would make them like 2530's, only old T series instead of GT series) T3................................T3/T3 JWT Sport 650 (T3)......T3/T3 GT2530......................GT25/GT30 GT2540......................GT25/GT40 Sport 700/GT28RS,2830..GT28/GT30 GT2835......................GT28/GT35 GT3037......................GT30/GT37 GT30R........................GT30/GT30 ??GT28R.....................GT28/GT28 ? Keep in mind that the names are generalizations, since you can have many different configurations of the same turbo. For instance, you can have a T3 with different A/R ratios, inducer, exducer, etc. And if someone doesn't do their research and know what they're doing, they can attempt to duplicate a name brand turbo like HKS2530's but get the specs like the A/R or inducer wrong, making it laggy or low powered.
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