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  1. RPi Dyno Dynamics verified, +10 HP w/ Block-Off Plates! [new best bang for the buck!]

    E60 M5 and E61 M5 Touring Discussion
    First of all, I want to thank Eloy for taking care of me today on short notice... oh, and testing my car as well. :grinyes: How the 422 whp is derived, I will build up to it. A little background. I am as much a skeptic as anyone... almost to the point of being cynical. I am sure Eloy will back...