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Old 09-10-2003, 12:09 AM   #1
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Why do we get small exhaust?

I went to an RSX board. This guy posted a video of his car with the Borla exhaust and it got me wandering. Why do we only get 2.25 or 2.5 when the RSX gets a bigger one it's like 4" I think?


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Old 09-10-2003, 12:12 AM   #2
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Wandering ? or Wondering ? Anywho, we get the 2.25 because it is optimal for the Focus. I can't imagine a 4" exhaust on any 4 cylinder car would be very good. Maybe if you have a turbo charger ?
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Old 09-10-2003, 12:13 AM   #3
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if he has 4" he either has a turbo w/ a good amount of boost or hes losing alot of needed backpressure
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Old 09-10-2003, 12:14 AM   #4
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4"..wtf..thats like a stock exhaust on a school bus n r u sure its the whole exhaust? it could jus be the tip

Last edited by FoRdFoCuZdRiVeR; 09-10-2003 at 12:16 AM.
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Old 09-10-2003, 12:33 AM   #5
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People who have bigger than needed exhausts are just trying to make up for something else. seriously 4" is just very uneccesary.
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Old 09-10-2003, 12:34 AM   #6
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it is if you have a nice turbo and good boost, which i doubt they did
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Old 09-10-2003, 02:10 AM   #7
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Yah no crap...I thought the bigger the exaust on a 4 cylinder the worse...2.25 optimal for stock car, and anything bigger needed turbo or bigger engine... well I gues I'm right :) tnx
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Old 09-10-2003, 02:12 AM   #8
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LOL 4-5 inch exhaust systems are mostly found on industrial trucks, busses, firefighting apparatus, etc, Im sure the 4" comes from the tip on that exhaust system , optimal for an RSX is 2.5" I believe for that piping...
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Old 09-10-2003, 02:15 AM   #9
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Yeah it must be the tip b/c I would think even a turbo charged car with boost or something like it would only need like a 3-3.5" exhaust.
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Old 09-10-2003, 04:03 AM   #10
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I can think of only 2 reasons he would have a exhaust that big, 1- he's making like 600 HP, or 2 has a turbo with a 4" outlet, both of which I really doubt, its probably just a 4 inch tip
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