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I've often wondered if the performance gain is worth the price (vs. the gain of a non-kitty one). We're talking about a $500-ish difference in price.
Has anyone seen any dynos of a kitty one vs. non-kitty (stock or same mods/engine), or have any experience with sound of both?
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2011 535i M-Sport - MHD Stage 2+, xHP Stage 3, FMIC, ER Chargepipe, RM Motors catted d/p, Megan Racing Supremo Exhaust
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