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of a good tune (Specialty Z) at a very high boost level. My sport 500s blew 26 or 27 pounds worth of boost, which is quite high for those type of turbos. If they were ball bearing like the sport 530s, 27 psi would be no problem. I never take them that high normally, letting them typically max out around 24 psi or so, but I have hit 27 psi a couple times. I have stock headers still. Keep in mind: That dyno run (493rwhp) was before I upgraded to the full 3" Specialty Z exhaust setup, and I'm really confident that my car is now making over 500rwhp at max power. Once I get the MS manifolds and cams, I hope to do even better =)
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