Up pipe and headers. - Subaru WRX Forum
 
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#1 Old 10-12-2009, 03:39 PM
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Up pipe and headers.

What is a good up pipe that wont throw CEL and what is a good set of headers??
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#2 Old 10-12-2009, 04:05 PM
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Just get an STI up pipe or 06/07 WRX one as they are both catless. And why do you want/need headers? There are a coupe different types.

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
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#3 Old 10-12-2009, 05:11 PM
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Any up-pipe is going to cause a CEL from eliminating the cat.
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#4 Old 10-12-2009, 09:19 PM
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Quote:
Originally Posted by C89ZX7R View Post
Not Really. It actually comes from eliminating the egr probe that the catless up-pipes don't have a provision for. A cel fix can be used on the egr probe.
I didn't say the cel can't be eliminated. I think you mean EGT probe. Yes, not having it in use will throw a cel. Also, some cat-less up-pipes DO come with the egt bung and if one decides to use their egt sensor without the cat, it will throw an exhaust gas temperature circuit malfunction code.
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#5 Old 10-13-2009, 05:06 PM
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Would my stock up pipe be a bad choice to keep on my car if i Stage 3 it. and if i change headers will it throw emission codes or would i need to?
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#6 Old 10-13-2009, 07:19 PM
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Because your stock up pipe has a catalytic converter in it... read this: Uppipe FAQ: Read if you are thinking of buying one! - NASIOC

and this: Header FAQ: Read if you are thinking of buying one! - NASIOC

John
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)
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#7 Old 10-14-2009, 01:58 AM
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Quote:
Originally Posted by blueman View Post
Would my stock up pipe be a bad choice to keep on my car if i Stage 3 it. and if i change headers will it throw emission codes or would i need to?
Well regardless, even a stock 02-05 wrx can benefit from running a cat-less up-pipe due to safety issues regarding the catalytic converter, like Man Show said. Btw, what is your idea of going stage 3?
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