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Hi all, I've been reading threads like this vigorously trying to figure out if I need to replace my exhaust (and potentially my CATS) -- I have a 2013 Monterey SY 340 with twin Merc 377 Mags EC - with PCM 555 control modules.
SERIAL NUMBER(S):
Port; 2A079834
Starboard; 2A031052
My question --...
