SubieKid91 Posted August 27, 2022 Share Posted August 27, 2022 (edited) I have a 2005 legacy 2.5i AT, non turbo. I found an aftermarket exhaust manifold for the car, but one of the notes say; you can use the stock downpipe or an aftermarket downpipes that fits. The brand is Tsudo, if anybody has ever heard of them. Are there any sensors in the stock downpipe? Should I change the downpipe? Thanks Edited August 27, 2022 by SubieKid91 Link to comment Share on other sites More sharing options...
Pleides Posted August 27, 2022 Share Posted August 27, 2022 Why are you changing out the exhaust manifold (headers)? The stock downpipe has a sensor for the catalyst to make sure it's working at its correct efficiency for emissions. You should not change the downpipe at all. Leave the car be unless you're replacing rusty components, then I'd recommend getting something from a recycler in your nearest salt-free state. Link to comment Share on other sites More sharing options...
Infosecdad Posted August 27, 2022 Share Posted August 27, 2022 If you have a non-turbo, you don't have a downpipe. The downpipe only exists with a turbo. I've used Tsudo before on an '01 RS, didn't have any issues. Can you post a link to what you are looking at? Link to comment Share on other sites More sharing options...
Max Capacity Posted August 27, 2022 Share Posted August 27, 2022 You can find pictures of what you have from that link. Oh, welcome to the Forum, ask us before you spend your money. 1 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
SubieKid91 Posted August 27, 2022 Author Share Posted August 27, 2022 @infosecdad https://semotors.com/tsudo-97-05-subaru-impreza-legacy-forester-outback-2-5rs-ej-uel-header-v2/?srsltid=AdGWZVTmpzXs_59O2BrOfAclEOdfdRK4OUjmEnToMhA_qv7Y9BrLt8_E9z8 Link to comment Share on other sites More sharing options...
Infosecdad Posted August 27, 2022 Share Posted August 27, 2022 Not sure that will work. Have you looked under your car to see what you have now? https://parts.subaru.com/Subaru_2005_Legacy-25L-4AT-4WD-Sedan/Engine-and-Cooling.html Looking at the parts diagrams, looks like there are a couple of possibilities for the '05 2.5i Not sure if one is Cali and the other is general or if they changed the design in the middle of the year. One looks like it might work, the other really doesn't. Link to comment Share on other sites More sharing options...
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