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Hello, I'm looking for preformance parts options for my 1998 Subaru Legacy Outback. I have an automatic with a 2.5, currently I'm installing King springs with KYB struts. Im exited to see what is out there for this Subie. I want to install a performance radiator, eventually a Magnaflow exhaust and anything that will make my Subie run like a champ.
 

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'97 Outback stock - Well she was rolled 7/9/17 coming back from Savannah, Ga and totaled :-( Not I have an '07 Outback - not sure for how long though - would like an XT :-)
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Hello, I'm looking for preformance parts options for my 1998 Subaru Legacy Outback.
I don't think there are 'preformance parts' for our 2.5 NA engines. Pretty much a stock engine & components is all I would be comfortable running.

IF you have the time, money, and talent you could find (purchase) and install some type of turboed engine, and drivetrain setup. Using an OBXT, WRX or STi base, see if you can buy a wrecked vehicle, and change over the items needed for the transformation. It has been done before, also it will most likey be accomplished again.

Good Luck,
Later, T.J.
 

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(formerly) 03 H6 OBW , (presently) 06 WRX Sportwagon & 2021 Honda CR-V
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boxer4racing.com has some legacy 'sporty' bits. But not much for xtra HP.
 

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'00 Legacy OBW Ltd
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306 Posts
How much money do you want to spend?
* Basic maintenance (Headgaskets, timing belt, spark plug wires (OEM), spark plugs and other)
* Equal Length long tube header (OBX/Cobb/Rallitek)
* Delta Cams 1000 grind or more aggressive 1500 grind Delta Camshaft
* ECU tuning (standalone like MegaSquirt)
 

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1998 Subaru Legacy Outback
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Where do you guys find these headers?... Cause I went on all those manufacturer's websites and none seem to offer anything.

Andre
 

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'00 Legacy OBW Ltd
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The OBX long tube header is available on eBay. Search for "Subaru header 2.5rs" and scroll until you find the header. "Racing Parts Depot" is the vendor selling them.

These headers are a clone of the Rallitek & Cobb which are both discontinued. Don't use the gaskets included. Use OEM Subaru items instead.
 

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1998 Subaru Legacy Outback
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976 Posts
The OBX long tube header is available on eBay. Search for "Subaru header 2.5rs" and scroll until you find the header. "Racing Parts Depot" is the vendor selling them.

These headers are a clone of the Rallitek & Cobb which are both discontinued. Don't use the gaskets included. Use OEM Subaru items instead.
Thank you... I found them it.

Question... the straight pipe that comes with the headers... is that a CAT delete or is it a high flow CAT? It actually does look like it deletes the OEM CAT that is right after the OEM header flange. Any issues with car inspection or any CEL?

White researching the OBX headers, I also found CNT headers but their website says that they are out of stock. There's a video on youtube of a before and after of this system and there was a 14 whp & 15 wtq increase over stock... pretty impressive.

Andre
 

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Car inspection is state-by-state. Some states (Caifornia for example) are ultra strict about it, others don't even have an inspection at all. You'll have to check local laws to be sure.

You usually need to wire up a hack on the oxygen sensor harness to fake out the ECU and prevent check-engine lights.
 

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'00 Legacy OBW Ltd
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The pipe after the headers is a CAT delete.

The ECU will most likely throw a MIL with a OBD P0420 code (Cat Efficiency below threshold).
 

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1998 Subaru Legacy Outback
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The pipe after the headers is a CAT delete.
****... that's exactly what I didnt' want... lol. I already have to deal with the for my S2000... so didn't really want to deal with it for my Scooby.

I was doing some more research and it seems the only header system that replaces the header only without a CAT delete is the Borla header. Not sure if the gains from just the header is worth the $400 price tag as the gains seen with the CNT and I'm sure the OBX are results of deleting the CAT.

Going to see if I can find any numbers for the Borla header before moving forward. My exhaust system is pretty much falling apart from rust (already has a hole) and thought I might as well replace the whole thing along with new headers.

Andre
 

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Hate to discourage you further, but be aware that the extra power bump you get from exhaust is mostly at high rpm- not off the line. Since your car is an automatic, it will be harder to actually use that extra HP without overriding the trans by selecting a lower gear.
 

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2010 Outback 2.5i Ltd.
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Except for WRX's Subaru aren't made for speed there made to last a long time. If you want speed then WRX's is the way to go.
 

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Except for WRX's Subaru aren't made for speed there made to last a long time. If you want speed then WRX's is the way to go.
That's where it gets fun. A WRX engine will pretty much bolt straight in to an Outback. That will usually show an extra 80hp right away, and that's just getting started. You can get LOTS of performance goodies and keep adding power in incremental steps until your bank account is curled up crying in the corner.
 

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1998, 2.5l H4 subaru legacy outback
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try new intake
headers
delta cams
exaust
light weight pullies or a flywheel but not both
and maybe voltage stabilizer for the automatic or if you get lightweight pullies
then after that get an ecu tune for all the mods
thats what i planned to do and make around 200-220hp+
also for performance take weight out that you can

and about the exaust only adding power at high rpm when you floor it in drive it shifts around 6200rpms and the redline is 6500 so shifting manual wouldnt help to much
 

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That's where it gets fun. A WRX engine will pretty much bolt straight in to an Outback. That will usually show an extra 80hp right away, and that's just getting started. You can get LOTS of performance goodies and keep adding power in incremental steps until your bank account is curled up crying in the corner.
:7:

And, the "red line" can be altered through reprogramming.
 
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