RE: which turbo to buy?
the gt2x is smaller than a gt25 which as about the same size as a 225 TT ko4-2x turbo. ATP over inflates all of there claims on their website. From the dynos i have seen people have made about the same amount of power with a ko4-2x but have way more torque. Plus the fueling and tuning atp sends you is so bad its unreal. Also other people have had problem getting their cars to run well on the gt2x (transverse guys) while the a4 guys have had better results. A much better option would be to get the regular ATP hardware kit (real manifold with a real turbo) and get tuning from either revo, unitronics, or giac (new files). Cost will be a little more but you will have far better gains and spool will be atleast 300-500 faster with a normal t3 or t25 housing.
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FACTS > followers
197whp and 292wtq with no chip on stock ic, airbox and catback
AEG crank +Scat rods + 83mm Wiseco pistons = CincyTT Version 2.0T
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