Quote:
Originally Posted by Str8 RippiN
i currently have the 445 and i'm thinking about going 525, would you say it was worth it? and is the pump a necessity? I have euro/csl headers and was thinking about going epics as well. Interested to hear your thoughts!
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Beware that ESS require Euro/CSL headers. Many people have had problems with other headers, even with NA tunes. ESS claim it's the primary O2 placement.