EJ22 Exhaust (in EA81)

[MSSLGECKO]

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.

[Jerry DeMoss]

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.

[MSSLGECKO]

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.

[NVBigBlue]

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

NV

[MSSLGECKO]

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.

[MSSLGECKO]

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

[calebz]

Not sure, but its going back