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ESS or COBB for a 335IS?
Been searching and lurking for several months trying to decide to tune or not. No plans for extensive mods but would like better throttle response and a bit more power. Have a 2011 335is with 8,000 miles on it and want something realiable and issue free (for dealership visits also). Can't seem to decide between ESS or COBB? Seem like COBB is much more popular but why? No plans for an FMIC, downpipes, meth or dragstrip time. More of a weekend driver since I travel weekly. Have 93 octane readily available in my area. Any advice?
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