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what is best size when upgrading exhaust system?

  #1  
Old 05-28-2009, 12:38 PM
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Question what is best size when upgrading exhaust system?

I have a 98 eclipse, n/t.

I want to upgrade the headers, cat and catback exhaust but there are a few different intake/output sizes on the market

currently have 2" intake/output

can I upgrade to 3" or would 2.75" or 2.5" be better all the way through (headers/cat back/cat)

also, what is the difference between a cat converter and a test pipe?

leslie
 
  #2  
Old 05-28-2009, 03:47 PM
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dont go bigger than 2.5" and dont get rid of the cat
 
  #3  
Old 05-28-2009, 05:25 PM
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Awesome - thanks!

Any reason 2.5" is best?

Can you offer any recommendations on brand or a site that might offer a full exhaust from headers to cat to cat-back?

Do most exhaust systems come separate (buy the header, buy the cat and buy the cat-back exhaust?)

What would be the cons of 3" vs. the 2.5" or 2.75"?

Your help is greatly appreciated

wanting more horsepower,
leslie
 
  #4  
Old 05-28-2009, 07:27 PM
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the thing is when you start getting larger than 2.5" on a NT car you begin to lose backpressure which is very important on a NT car. And also when you start getting too big on a 4 cyl car you will get a very raspy sounding exhaust.

As far as what type to get...everything typically comes separetly. But alll you need to get is headers and a catback. No need to replace the cat that you already have. I would suggest Apexi or Magnaflow for exhaust as they should both give a decent sound. Here is a good site
http://www.cimotorsports.net/motor-s...back-exhausts/

And i think either of these headers are nice
http://www.cimotorsports.net/motor-sports/headers/

But you can do a search on google or something for other sites that may have them cheaper. Just stay away from no-name brand stuff and ebay
 
  #5  
Old 05-29-2009, 10:31 AM
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Thank you very much - I can't wait to do a bit more of an educated research into my upgrade

I will be sure to ask for more advice, when the time comes
 
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