| ok to start, im in the market for some turbos that can acheive low 5's atleast. mods: stock motor 740's z1 smic ligthwieght flywheel rps 6puck safc 2 duals intake uego wideband 2.5 downpipe 2.5 testpipe 2.5 boala catback ngk plugs greddy profec b2 deleted prvr , egr, plenum coolent lines. i am stuck deciding to get a new pair of gt28rs or sp600's (4bolt series)... which turbos do you guys think better fit my needs. i know the rs's are equivelent to 700's. although im not goin to high on a stock motor. therefor, if the sp600's can meet my needs i would prefer them. i did search but not sure of how big the diference is between the ball bearing and not an if they can still make the same power for the sp600's. thank you... deciding on turbos turned into a 3 week project so far lol.
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