Thread: BMW M4 CSL Gets BIG Sound Upgrade From Valvetronic Exhaust!
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      11-29-2022, 03:02 PM   #17
nicksm3
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Drives: e92 m3 Competition
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Quote:
Originally Posted by stevehifi View Post
I see yellow springs on the rear - is that factory or KW HAS?
Aftermarket probably KW
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