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Old 03-25-2002, 05:16 PM   #1
MatyBMW
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EXHAUSTS: 2.5" single vs. stock dual

Which is better for the e30 325is:

1. 2.5" single exhaust from the cat-back

OR

2. Stock Dual (1.5" ??) exhaust

What are the pro's and cons of each. Motronix suggest scrapping the dual and going with the single 2.5" or 3".

What do you advocates think????????????
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Old 03-25-2002, 11:08 PM   #2
Dluxazn58
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dual is always better...
i forget why..
something about losing "airspeed" of the exhaust gases..
in a single... the exhaust gases slow down..
i could be wrong.. someone correct me on this..

but yeah since you have an i which is dual all the way back... why not keep it that way?

if you want to go custom.. why dont you go dual 1.75 from the cat with a custom 2in 2out muffler..
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Old 03-27-2002, 01:44 AM   #3
Eurostyle
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If I was you i'll go for the single 3". My friend had it done to
his "e" block "i" head E30 and the price was realy good, under $400 with a stainless steel mufler!
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