Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Posted 18 March 2007 - 01:39 PM
Also, what is the diameter of the exhaust manifold for an EA81? Thanks!
Posted 18 March 2007 - 02:12 PM
Posted 18 March 2007 - 03:53 PM
As far as exhaust size goes, it's been batted back and forth on here many times. Consensis is to use 1-7/8" ID pipe from the heads to the cat, then some go 2" ID others 2-1/4" ID back to muffler, then maybe 2-1/2" tailpipe.
If that cat is 2" ID inlet, then 1-7/8" ID pipe should fit inside it as it's basically a 2" OD pipe. Note that I said "should fit".
I think you'll be alright with the 2-1/2" outlet, as it's mostly the pipes from the head ports that are the critical ones for size. Would probally be of good benifit to make both header pipes the same length leading to the cat. You'd get a better balance of exhaust flow that way. Think it was Phizinza that did an equal length header pipe on his, looked good if it didn't improve anything else.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users