98LegOB Posted March 5, 2014 Share Posted March 5, 2014 Hey guys, I was wondering if you knew of any decent uel headers that fit a 98 Leg Ob other than Borla and no-name ebay pieces. IS there anything else? Is it possible to use stock WRX (or other H4 turbo) exhaust manifold? As for exhaust, what is the typical "best" size exhaust for these engines? 2" 2.25" 2.5"? I know there is a "too big", just not sure what that is for this 2.5 H4. I think the plan is to most likely keep both cats as is, and just replace the headers with uel and (most likely) 2.25" catback with decent resonator and stock Wrx muffler. Should be enough flow, sound "subie" enough, and still be pretty quiet. Link to comment Share on other sites More sharing options...
Zues Marine Posted March 6, 2014 Share Posted March 6, 2014 is there a reason you are trying to trailblaze with all of your mods? why not stick with what works, like for example the Speedyracer UELs, or the Borlas...if anything else were more effective, you probably wouldnt have to ask the question. there is no physical way to mate a turbo manifold to these N/A motors if youre staying with stock motor internals, 2 or 2.25" is the biggest you should be running, (stock is 1 7/8") and yeah, no need to mess with cats, i had an 18" resonator from Vibrant and was pretty pleased on the cut down of the raspiness.. but the WRX muffler is almost exactly the same sounding as the stock legacy muffler, youre better off with almost anything else if you want noticeable sound, even if youre shooting for subtle.. the wrx muffler is a waste of money Link to comment Share on other sites More sharing options...
Kennyfvholla Posted March 7, 2014 Share Posted March 7, 2014 I see the weirdness Zues is seeing, but that's because you haven't quite done enough research into exhaust systems and we're not quite sure what your after. -- The first thing I am going to say, is, that unless you are attempting to drop an NA engine that makes much more than stock levels of power, that debating on what flows best / what makes the most power is the most pointless thing you can do. Our motors in stock form don't flow enough air, to the point that the difference is going to be so negligible. -- For a stock motor, 2.25" piping from the headers back is optimal if your running headers and are catless. If you're still running both cats, you can get away with a 2.5" catback with a muffler that isn't too free flowing, but you may lose some part-throttle power but gain throttle response. Back pressure is what determines the loudness of an exhaust system. The quieter the muffler, the more the restriction. So, all of that said, I would not run a 2.5" exhaust unless you are looking to make a lot of power. -- Now, your idea might help you make a bit more power, but it will mostly give you a tiny bit of rumble. The stock WRX catback make very little discernible difference in loudness compared to the stock exhaust. If you're looking for the rumble, and a bit more noise so you can hear it, go with this setup: - Speedyracer UEL header - Keep BOTH of the cats and the stock cat-pipe - 2.0" - 2.25" piping all the way to the muffler - Use a universal Dynamax muffler -- This brings me to my question.. What EXACTLY are you looking to achieve from adding an exhaust system to you car? Link to comment Share on other sites More sharing options...
camroncamera Posted March 7, 2014 Share Posted March 7, 2014 Nameless Performance here in Washington State might be the guys to talk to about getting a new, top-quality, made-in-USA header/exhaust system developed for N/A 2.5 H4's. http://namelessperformance.com/blog/ Link to comment Share on other sites More sharing options...
blankdeluxe Posted March 7, 2014 Share Posted March 7, 2014 I only run 2.5" in my car right now and i'm turboed. If you run 2.5" N/A its going to be louder then hell. Turbo headers are just going to give you more headaches as well. You will have to make lots of custom pieces to get those to work out. Not worth it. Just get a good set of UEL's for N/A and do 2 inch exhaust back. It will be rumbly without being so loud that the cops will be looking for you everywhere you go. Just do what Kenny said for a good sound profile. Link to comment Share on other sites More sharing options...
Zues Marine Posted March 7, 2014 Share Posted March 7, 2014 I only run 2.5" in my car right now and i'm turboed. If you run 2.5" N/A its going to be louder then hell. had cammed and ported 2.5" on my green wagon, not as loud as youd think ...at least with a vibrant back there Link to comment Share on other sites More sharing options...
blankdeluxe Posted March 7, 2014 Share Posted March 7, 2014 had cammed and ported 2.5" on my green wagon, not as loud as youd think ...at least with a vibrant back there I had a can on mine. So basically just straight pipe Sent from my LG-D800 using Tapatalk Link to comment Share on other sites More sharing options...
98LegOB Posted March 8, 2014 Author Share Posted March 8, 2014 Thanks. All I had read about so far was just Borla, and no-name ebay borla knock offs. Will start looking into Speedyracer's. 99-05 Impreza Rs 2.5 sohc headers? Def plan on keep the whole catalytic section stock and in place. So 2 or 2.25" max on the catback? Hopefully the Speedyracer uel, (stock cat section) and 2.25" catback with good resonator and stock Sti muffler will be exactly what I'm looking for. Thanks again for Speedyracer, had no idea they existed lol Link to comment Share on other sites More sharing options...
Zues Marine Posted March 9, 2014 Share Posted March 9, 2014 yeah these are the ones those bastards gave me 6 bolts (only need 2) and only 2 of the three gaskets that are needed tho... i would recommend getting some heat wrap (50'x2" is just enough) it will help dampen the lifter tick noise caused by the thinner then OEM header walls Link to comment Share on other sites More sharing options...
98LegOB Posted March 9, 2014 Author Share Posted March 9, 2014 Would basic exhaust wrap be better than some sort of ceramic coating? Link to comment Share on other sites More sharing options...
98LegOB Posted March 12, 2014 Author Share Posted March 12, 2014 http://www.speedyracer.com/exhaust-parts/headers/1999-2005-SUBARU-IMPREZA-25L-RS-SOHC-HEADER-STAINLESS Just making 100% sure. These ^^^ 99-05 sohc impreza headers will 100% bolt up to my 98 dohc legacy outback no problem? Would hi-temp ceramic coating be as good as the header wrap? Link to comment Share on other sites More sharing options...
Kennyfvholla Posted March 12, 2014 Share Posted March 12, 2014 Yes, that header is the correct one. I'd only use wrap if I'm honest.. Link to comment Share on other sites More sharing options...
98LegOB Posted March 15, 2014 Author Share Posted March 15, 2014 Well the Speedyracer Uel headers showed up today. Pretty shoddy welds, which I kinda expect from a $130 header, but it came with zero gaskets and zero hardware. lame. Hopefully it is more durable than it is pretty. Link to comment Share on other sites More sharing options...
98LegOB Posted March 15, 2014 Author Share Posted March 15, 2014 Can we reuse the stock hardware and pick up new stock gaskets from the parts store? Or are the gaskets/hardware different? Link to comment Share on other sites More sharing options...
Zues Marine Posted March 15, 2014 Share Posted March 15, 2014 The hardware Is the same, I'd buy new gaskets tho.. They jacked up sending me stuff too Link to comment Share on other sites More sharing options...
Kennyfvholla Posted March 15, 2014 Share Posted March 15, 2014 That's strange... Mine came with gaskets and bolts. OE bolts are better though. Also, yeah, the welds look kinda meh, but they're not bad. Not a single person has had a single issue so far. And, since we're NA, if the welds flake apart any it wouldn't matter because there's no turbo to destroy. Link to comment Share on other sites More sharing options...
98LegOB Posted March 15, 2014 Author Share Posted March 15, 2014 Just emailed Speedyracer to see if the could send the gaskets. there were a few holes in the box, so my guess is they fell out lol. Link to comment Share on other sites More sharing options...
pindymed Posted May 1, 2014 Share Posted May 1, 2014 I just have this one installed on my baby, comes with gasket and bolts. Great fit! http://www.speedyracer.com/exhaust-parts/headers/1999-2005-SUBARU-IMPREZA-25L-RS-SOHC-HEADER-STAINLESS It states includes bolts in description, Link to comment Share on other sites More sharing options...
dudewerx Posted May 1, 2014 Share Posted May 1, 2014 So it says for the 2.5 only.... Why won't it work on my 2.2 or will it? Link to comment Share on other sites More sharing options...
Zues Marine Posted May 1, 2014 Share Posted May 1, 2014 they will only work on the '95 EJ22 because they have dual port heads, '96+ had single port Link to comment Share on other sites More sharing options...
dudewerx Posted May 1, 2014 Share Posted May 1, 2014 any suggestions on a single port header supplier? Totally dig your lightbar zues Link to comment Share on other sites More sharing options...
twisty Posted May 1, 2014 Share Posted May 1, 2014 ive got my eye on two of those suckers, both the 95 L ej22 and the96 GT ej25. if i could only stop spending money on frivolous stuff. like kids clothes, kids lunch money, etc... Link to comment Share on other sites More sharing options...
blankdeluxe Posted May 1, 2014 Share Posted May 1, 2014 any suggestions on a single port header supplier? Totally dig your lightbar zues Build your own. There is a guy over on 2.5rs that was building them and selling them on eBay but they were 300+ if I remember right. Sent from my LG-D800 Link to comment Share on other sites More sharing options...
dudewerx Posted May 1, 2014 Share Posted May 1, 2014 Check this out http://m.ebay.com/itm/200903970055?cmd=VIDESC&gxo=true thought? This is the single port header right? Link to comment Share on other sites More sharing options...
blankdeluxe Posted May 1, 2014 Share Posted May 1, 2014 Check this out http://m.ebay.com/itm/200903970055?cmd=VIDESC&gxo=true thought? This is the single port header right? Yeah but those a factory Equal Length so no rumble Sent from my LG-D800 Link to comment Share on other sites More sharing options...
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