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Guest Message by DevFuse

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custom "Y" pipe

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4 replies to this topic

#1 lagwagon


    USMB is life!

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Posted 09 April 2004 - 11:47 PM

I want to make a custom "Y" pipe.I have a bunch of 2 inch and 1 7/8 stainless steel tubing. I wonder which size I should use? I'm going to try and match the lenght of the "Y" pipe. I have heard this helps on normally asperated motors to match header lenghts.What do you think?


#2 subaru_styles


    the 1st RX wagon!

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Posted 09 April 2004 - 11:56 PM

on mine john left the stock tubing off the manifold. right after the bend is where the new pipe went. with a a very smooth merge where they come together

#3 GLCraig



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Posted 10 April 2004 - 12:02 AM

What gauge/wallthickness is your tubing? If it thinner then 14 gauge (.075 wall) it maybe difficult to weld to the fanges.

#4 Flowmastered87GL


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Posted 10 April 2004 - 12:17 AM

The size pipe really depends on how you want your power curve to be... mine is pretty high up there compared to stock (but thats where I keep the engine so it works for me)

I run 2.0 from the heads to the cat, 2.25 to the muffler (midpipe) and 2.5 out from the muffler. (all measurements in inner diameter)

#5 TomRhere


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Posted 10 April 2004 - 06:02 AM

I'm strongly considering one of these http://www.discountc...images/8015.gif for on the ER-27 exhaust when I get to that point, also comes in a 2-1/2" size. Equal length lead pipes, with a cross-connection is the best route for power gains. Any bends in the system, should be as smooth as possible, too.

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