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MY00 Subaru Impreza 2.5RS BRP
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2,605 Posts
Discussion Starter #1
what is the best size for MY02RS when it comes to selecting an intermediate pipe? Is 3" for WRX only? I've heard 2.5 and 2.25... what do you guys have?
 

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2000 2.5RS
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196 Posts
2.25" piping is good enough for 2.5RS. i think 2.5" will lose some low end torque but some improvement on the high end.
 

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13 Years of RS
2005 Toyota Corolla :(
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5,532 Posts
I left the stock mid-pipe on when I put my Stomung exhaust on, and it seems to work pretty well together. Just doesn't seem like it would be worth the money for the midpipe to free up maybe 1 horse, especially at the risk of losing low end. Actually, I'm not even sure what size the stock mid is.
 

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189 Posts
I have a 2.5" catback and have had barely noticeable low end loss, if any. Top end feels a bit better, but isn't earthshattering ;) I doubt the gains would be all that much different from the 2.25" catback. I bought the 2.5" thinking it would compliment future FI mods better... and now I'm selling my car... lol time for a wagon to haul all these parts around for my business... possibly one with an STi drivetrain swap :)
 
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