so the cat back of the ITR exhuast is 2"? or 2.25" except that bottle neck section?
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ITR JDM 4-1 Header on AUS ITR
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I have changed my stock audm header to a spoon 4-2-1 header yesterday. I took out the cat n replaced it with a test pipe as well. So everything is 2.5inch and bigger all the way to the stock exhaust which i did not do anything to it as i wanted a stock look from the back.
First impressions are that it revs much better now. It did not really boost performance that much but you can feel a smoother engine reving all the way to the red line.
Going to get my vafc tuned to this new mod as well as the improved piping. So maybe then my butt will be able to feel the difference.
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just to help out people -
i have a car , with a AUDM B18C7. It has a ITR 4-1 header and same sized cat+catback exhaust. OTherwise exactly the same as a stock type R.
On a recent dyno day it pulled 116kw at the wheels , compared to 3 other Type R's on the day it was one of the best numbers. I can say it is a noticeable improvement over the stock mild steel heavy header.
Plus the 98+ JDM type R makes 6kw more with this header (plus better fuel)
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I'm looking at doing the same.. tho I'm changing to the jdm headed to get the mugen twinloop sports exhuast catback to basicly just bolt on.. with my own cat. how ever im little confused to what cat to put on her... 100cel or 200cel lol
the JDM system is completely different has shorter cat different size pipe here and there ect. there's also a mounting bracket for the headers that's different for the JDM so i hear (corrections any one ?)Living The Midnight Dream
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Originally posted by c01567 View PostSorry to bump an old thread,
I have a stock audm dc2r
If i buy jdm dc2r headers and cat, what mods do i need to make to my audm catback?
Got a set of jdm 4-1's if itnerested
"Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
Horse power is how fast you hit the wall, torque is how far you take the wall with you."
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