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People say that because they "gained less on the dyno" when going catless DPs than a 135i.
Fact: IKM0S ROM has more differences than just overboost/boost. Obviously the differences are going to be skewed.
It's simple, hook it up to a flow bench and prove it. Everything else is just an assumption.
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Bilstein CS | Rays ZE40 | Solid/spherical front / rear.
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