[BPMSport]

Originally Posted by flipm3

As much as many of us want to hit that 400whp NA Benchmark, I would try to focus more so on the change in power. These E9X M3s dyno stock very inconsistently throughout the world and for various reasons. When stock, there is evidence of stock E9X M3s having such a wide range of results all on the same type of dyno in similar conditions, but chances are they perform nearly identical.

I would roughly estimate that a primary cat delete, pulleys, intake, and a proper tune (Epic, Evolve, ESS, or BPM) would yield roughly 40-50+whp.

This.