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Old 06-28-2005, 01:29 PM   #1
Scooby Newbie
Member#: 60099
Join Date: Apr 2004
Location: N.Y.C.
2003 Impreza RS
The perty blue one

Default Muffler Question

How much performance damage/gain can just a muffler do? If it's too resrictive, I can understand the loss in power. But having 2.25" exhaust all the way through until you hit a 2.5" muffler, can that difference be enough to actually be measured? Or to make a difference?
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Old 06-28-2005, 02:08 PM   #2
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Join Date: Oct 2003
Chapter/Region: NESIC
Location: ME
00 GC6


no. a catback barely gives you any power, nevermind a muffler.
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Old 06-28-2005, 03:38 PM   #3
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2005 Mazda3 Hatch
Titanium Grey Metallic


I'm having basically the same debate. I'm going with a 3" axleback section to a 2.25 inch pipe to the cats. But with a 2.5 muffler, no. I doubt you'd seen any change in performance whatsoever. That'd work fine
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Old 06-28-2005, 06:01 PM   #4
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Location: Nor Cal
2003 WRX


The highest restriction is gonna be the lowest diameter pipe, so when you have a 2.25 inch all the way to the axle back there isnt really a point in going from 2.25 into a 3.

Especially when 2.25 is big enough anyways. Just try to find a muffler that doesn't have tons of baffles in it.
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