Thread: Eisenmann down pipes and H&R springs installed
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      09-22-2018, 11:05 AM   #19
M4LAKA
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Drives: 2022 M5 Comp
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Originally Posted by Miko M View Post
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Originally Posted by M4LAKA View Post
Do upper down pipes have cats as well?
I believe so
I wonder if any noticeable performance or audible gain replacing upper Downpipes as well.
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