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  #16  
Old 03-25-2012, 11:01 AM
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svxcess svxcess is offline
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Re: Help me plan my exhaust repair/upgrade please?

Quote:
Originally Posted by DiabloScoobyru View Post
Nice, those sound pretty bad ass Thanks for the photos, that'll make it much easier to plan everything out Only difference I can see is the 3rd O2 sensor in your pics (I have a 92, so afaik there are only 2 front ones)
If you have a 92, you only have the 2 O2 sensors and can use the AR20 resonators as pre-cats without any problems.


I originally used these resonators as pre-cats on my 96 (OBDII). The emissions standards were stricter and I had to change them over to small Magnaflow high-flow pre-cats to avoid a CEL.

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HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler.


R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016

2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback

2007 Mazda Miata MX-5 PRHT...102,000 miles.
Plenty of parts, service and windshields.


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  #17  
Old 03-25-2012, 12:39 PM
DiabloScoobyru DiabloScoobyru is offline
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Re: Help me plan my exhaust repair/upgrade please?

From the looks of it then, the AR25 2.5" resonators would fit as well. And they are cheaper than the 20 from what I've found

So I gather from your photos, if I were to use the AR25 as a precat, I would have to fab up a flanged pipe from the header to the resonator, then into the main cat. from there, out to 2 pipes into the glass packs, then stock tips welded onto the cherry bomb. Sound about right?
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  #18  
Old 03-25-2012, 09:32 PM
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Re: Help me plan my exhaust repair/upgrade please?

John, how much did your exhaust cost? The previous owner on mine put in an aftermarket resonator and it has developed a huge crack where it meets back to the pipe, and I'm tired of patching it up every 3 months. I want it to sound stock, but my college wallet doesn't leave much room for my expensive taste. Yours is shiny.
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  #19  
Old 03-26-2012, 07:38 AM
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Re: Help me plan my exhaust repair/upgrade please?

Quote:
Originally Posted by DiabloScoobyru View Post
From the looks of it then, the AR25 2.5" resonators would fit as well. And they are cheaper than the 20 from what I've found

So I gather from your photos, if I were to use the AR25 as a precat, I would have to fab up a flanged pipe from the header to the resonator, then into the main cat. from there, out to 2 pipes into the glass packs, then stock tips welded onto the cherry bomb. Sound about right?
The AR25's are too big to use as a pre-cat. They have a 2.5" inlet and outlet. Use the AR20 instead. A 2" header pipe is an "upgrade" since the stock header pipes are about 1 3/4" anyway (svxfiles has the exact measurements on this)

You also need that same 2 " pipe that exits the AR20's to go into the new Magnaflow main cat.

Look in svxfiles locker HERE

These are photos of the exhaust system he did on Harry Newman's "newsvx" 1992 pearlie. It is basically the exact same exhaust that I have from the main cat forward. Start at photo 40.

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Subaru Ambassador

1996 Polo Green LSi #216..138,100 miles...SOLD

JFICX8659TH100216.....Date of Manufacture: November 16, 1995.....
Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan

In-Service Date: January 2, 1997



"The Pristine Green Polo Machine”
First Polo Green on the Network
First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000)
First 5000K HID factory fog lights (2007)
First SVX JDM BBS wheels on a USDM SVX (2013)

HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler.


R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016

2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback

2007 Mazda Miata MX-5 PRHT...102,000 miles.
Plenty of parts, service and windshields.


4th Registered Network member —2/21/2001

My NEW locker..I...My Email..I..Wikipedia/SVX .

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  #20  
Old 03-28-2012, 08:28 PM
DiabloScoobyru DiabloScoobyru is offline
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Re: Help me plan my exhaust repair/upgrade please?

Thanks for all the input, info, and help guys I think I have it figured out. Going to keep the pre cats (planning to move out west, so just in case I want to keep it stock looking as much as possible), run an AR20 or AR25 resonator in place of the stock resonator, into the 94007 cat, stick a y pipe behind the cat, and run directly to the 12" glass packs. Cheapest and easiest way I can think of doing it, and easily modified later on for the down pipes. I do plan to gut the pre cat's though for the moment. I'll try and post some pics next week after I get it finished
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  #21  
Old 03-29-2012, 08:38 AM
92snowmachine 92snowmachine is offline
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Re: Help me plan my exhaust repair/upgrade please?

careful about moving the cat any farther away from the engine then it already is (especially if you gut your pre-cats) because the farther it is and cooler it is the less it will work. you may end up having to monkey with your car to pass emissions.
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  #22  
Old 03-29-2012, 08:47 AM
DiabloScoobyru DiabloScoobyru is offline
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Re: Help me plan my exhaust repair/upgrade please?

Yup. Planning to keep the cat as close to stock location as possible. As far as emissions goes, since the car is pre OBDII, its only a visual inspection. As long as the emissions stuff looks to be there, it'll pass Granted, that may change when I go west to Oregon, but that won't be for some time yet.
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  #23  
Old 04-02-2012, 07:20 PM
DiabloScoobyru DiabloScoobyru is offline
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Re: Help me plan my exhaust repair/upgrade please?

OK, so for a small update:

Slight modification to the plan. Resonator is getting tacked in 2-3" back from the cat. from there it will run back and split off of a Y pipe, where it will come back and bend 45 degrees opposite each other (on each side of the Y) and the 12" cherry bombs will be tacked in about 3-4" from where the stock tips come out. An adapter will be fabbed for 2.5" to 1.75" to fit the stock tips. Transverse/crossflow muffler will be removed and scrapped.

Pre cats will be gutted. Eventually the down pipes will be replaced with 2", with the pre cats being replaced either with an AR20 resonator, or 2 new high flow pre cats (undecided yet, and have to do some research on it first, due to emissions requirements here). AFAIK, it is possible to do the pre cats with AR20s here (at least as far as the one shop owner told me), so that may be the plan (Thanks Tom and svxcess ).

Parts list and price is TBD once I get it welded up. Will include measurements and bends (and if I can get a cad file from the bender I will post it too ) for anyone else who would like to duplicate. Planning for later in the week to have it done, depending on which shop I go with. Best estimate for labor so far has been $225 with "a good possibility of being less than that." Estimating 8ft of 2.5" aluminized exhaust tubing overall being invested in this project.

I have to check with one more guy tomorrow on price, he wants to have a look at the car. Personally I'd rather go to him, given his resume (check out http://www.mercenary-mechanic.com/Site/Experience.html, thats the guy) but we shall see. My normal "cheap" guy got rid of his bender :wtf:

Last edited by DiabloScoobyru; 04-02-2012 at 07:30 PM.
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