G37s 2008 factory pipe size
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Joined: Jan 2019
Posts: 123
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From: Olympia, WA
Here are the actual pipe diameter (actual hole not flange) for G37 coupe.
Y-PIPE:
Y-PIPE INLET (x2) : 1 5/8" or 1.625
Y-PIPE OUTLET (x1): 2 3/8" or 2.375
MidPIPE:
MidPIPE INLET (x1) : 2 3/8" or 2.375
MidPIPE OUTLET (X2): 2"
Muffler INLET (x2) : 2 5/16" or 2.313
(Part# 20100 JL01C)
Y-PIPE:
Y-PIPE INLET (x2) : 1 5/8" or 1.625
Y-PIPE OUTLET (x1): 2 3/8" or 2.375
MidPIPE:
MidPIPE INLET (x1) : 2 3/8" or 2.375
MidPIPE OUTLET (X2): 2"
Muffler INLET (x2) : 2 5/16" or 2.313
(Part# 20100 JL01C)
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