Up pipe and headers.

blueman · 10-12-2009, 03:39 PM

What is a good up pipe that wont throw CEL and what is a good set of headers??

newtothegame · 10-12-2009, 04:05 PM

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.

midniteblack · 10-12-2009, 05:11 PM

Any up-pipe is going to cause a CEL from eliminating the cat.

midniteblack · 10-12-2009, 09:19 PM

Quote:

Originally Posted by C89ZX7R

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.

blueman · 10-13-2009, 05:06 PM

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?

man show · 10-13-2009, 07:19 PM

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

midniteblack · 10-14-2009, 01:58 AM

Quote:

Originally Posted by blueman

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?