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Old 07-21-2003, 02:21 PM   #1
ttboy19
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Member#: 38043
Join Date: Jun 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2004 impreza rs4sale
'10 Legacy 2.5GT

Question Exhaust Piping/Muffler Inlet

How large is the muffler inlet/exhaust piping on a '04 RS. 2 inches, 2 1/4 inches, 2 1/2 inches, 3 inches?
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Old 07-21-2003, 06:00 PM   #2
PeterJ
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2002 impreza RS

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From the Cat back, the RS has 1.90 - 1.93 O.D. tubing. I just measured it the other day. Its not perfectly round so thats why there is some variation. I assume that the wall thickness is .065, so you can subtract 0.13 to find the I.D. I didn't measure the muffler outlet, but I think that its smaller than the inlet.
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Old 07-21-2003, 07:06 PM   #3
Julian
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MY00 RS
BRP

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I doubt they've changed that. My '00 RS came from the factory with 1-7/8" piping.
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