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they push 25psi and up, your talking to get the full use out of them,,,,,change the whole car from stock to built, motor,turbo's, etc,etc.......Running street, your leaning them down anyway, because they will run rich. So much fuel for a street mostly car. That's why IMO, they are the same price as RC555's, not many selling, made for track stars. When 9 out of 10 Z can't push down 575rwhp which 555 can do......
 STAGE V++++ Going to XIII and beyond :)
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