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You have to get a new crank pulley. Bigger one helps with belt slip and will give you more boost, unless you put a bigger pulley on the procharger to offset it.
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2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance
Stock Longblock
800 SAE rwhp. 9.4 @ 145 mph.
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