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Guest Message by DevFuse

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EJ22 Exhaust (in EA81)

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6 replies to this topic



    Certified Subaru Nut

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Posted 08 December 2005 - 12:42 PM

What are the suggestions on diameter of piping used for an EJ22 swap?
I plan to use the stock headers. I will then start looking at doing a side-exit exhaust if it's not too laborous. Ideally, it will exit on the pass. side through the hole for the side-step blank (brat) with the piping being welded onto a sheet of metal that will cover the hole w/ two (or one?) ports from the piping to meet up w/.

Any better ideas? What size piping would be easiest, best on both high and low range performance, and sound good?

Edit :: What emissions parts should I retain on the exhaust system? I'm in MT so I'm most concerned w/ performance and quality of sound. Also, I'm trying to do this inexpensively, so if I buy anything it will be my buddy's used glasspack.

#2 Jerry DeMoss

Jerry DeMoss

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Posted 08 December 2005 - 12:47 PM

For the exhaust I would go with 2.5" just cause you said you are going to build the brat most likely for rally so you will need a free flowing exhaust.I think that thing will sing with a 2.5" exhaust.Should sound good coming out of the side.I would love to see some pics if you got em of your project.



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Posted 08 December 2005 - 02:27 PM

It hasn't quite begun yet, I'm preping for finals week and collecting all the necessary parts in advance. Over my winter break I will be working on this, I'll try to get a digi-cam to borrow, but camera-phone pics might be the only thing I can get.

I was thinking 2.5" also. Should I just skip the muffler and cat.? Or should I at least run a glass pack? It might be too darn loud w/out anything.

#4 NVBigBlue


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Posted 08 December 2005 - 03:09 PM

Hey guys,
Not to rain on anyones parade, but I thought I read somewhere in a rulebook, that all exhaust must exit the rear of the vehicle. This may have been for WRC and not Rally Cross though, and I maybe totally mistaken. But it would really suck to go through all the work of building a great exhaust system and then find out you can't run the car in an event.
Just my $.02



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Posted 08 December 2005 - 04:56 PM

Some cars have stock side-exit, like the Dodge Viper for example.

You may be correct though. I plan to use flanges at a couple of points to allow easy removal when necessary. As for autocross, I've seen some cars run w/out any exhaust exit unless you consider under the car an exit.

And if they won't let me play w/ them, I'll start my own darn club and not let them race w/ me. :headbang:



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Posted 09 December 2005 - 03:59 AM

Admin's - Why Was This Post Moved To The Classifieds: WTB Forum From The Retrofitting Forum It Was Originially Posted In?

#7 calebz


    Andys Coupe killed my cat

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Posted 09 December 2005 - 04:47 AM

Not sure, but its going back

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