| I am looking for a turbo that has small lag and good driveability with about 420 rwhp potential. Z1 states that the GT500 has the same turbine and compressor wheels as the Sport 500s. Are the 360 degree thrust bearings in the GT500 better than the bearings in the Sport 500? I will add some downpipes when installing the turbos. Both of the turbos meet my needs, but I wanted to know if anyone could provide some facts to help me decide. David G
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