Ok, so I'm not new by any means to mods, I only have one question. Ok so I have the fujitsubo Rm-01a dual exhaust on my 06 ap2. And it's thrown a cel code for my o2 censor since I got it on, so I've been looking at test pipes to get and I know the Fuji piping diameter is 60.5mm, so I know for good flow I need a 60mm test pipe, or even the 60.3mm berc test pipe, but, I've been seeing the invidia 70mm test pipe with something called CELFIX, and I'm thinking I kinda need that since I have a cel code coming from my cat since I have an exhaust, but I know if I get a 70mm test pipe it's gonna bottle neck cause the exhaust is only 60.5. So is the CELFIX something I need? Because I can't clear this cel without flashpro, I've reflagged the battery and it comes back. So In my mind I'm thinking get the 60mm and deal with the cel until I get flashpro or hope It goes away with the new test pipe. What do you guys think?

 

You should not have a cel just from the exhaust. That means your cat is likely failing. I know the 06+ cars are much more touchy about the cel but I have never heard of just an exhaust causing the cel. I assume you have pulled the cel and confirmed that it is the right one.

To answer your question celfix is something built into the testpipe that attempts to stop the cel from coming on.

I like the berk test pipe because their celfix worked best for me but I have an 05. Invidia didn't work at all for me. I think the berk 60.3 mm test pipe will be good for you but remember that the cel fix is not guaranteed.

 

I just purchased a berk 63.5 testpipe w/ cel fix and swapped it on my 06, cel came on after 20 miles of driving.. It seems like the flashpro is the only fix to this issue

 

Yeah the 06+ really have a hard time with it. I have seen some people add on an angled piece and that helps but flashpro is something you should do with an 06+ anyways.

 

Yea I've had the cel code checked and it's an o2 censor cel, so I took the o2 censor off and check it, made sure it was completely clipped on, it looks fine, not overly dirty or anything, so I know it's gotta be from the exhaust, I've seen many new type cars have cels come on after an exhaust being put on, but it seems the berc 60.3 is the one for me since it's the right size and has the CELFIX also. But if it doesn't go away it's okay because after coilovers I'm buying flashpro anyways haha thanks for the help guys.

 

First of all no exhaust is going to give you an CEL but any ways I've had for the past 36.000 mile these http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html with a anti fouler and no CEL whatsoever so just buy those and the test pipe you want as Long as is Bolt on for the S and you'll be good to go!

Ps almost forgot my car was a my06 ap2!!

 

A catback exhaust can throw a cel..? Anyways, got the berk test pipe on and reflashed the ecu, cel came back, so I'm guessing since I don't have flashpro yet I may as well buy that thing celcode fix from bigdaddy

 

you prob have a bad o2 sensor or cat

berk has celfix on it even though it's not advertise. I'd stay away from invidia. their cel fix never worked for me

 

Just make sure to use an anti fouler in conjuction with the big daddy mini-cat that's what worked for me and 2006s and newer are very sensitive with test pipes or thats what I've heard/read and like I mentioned no CEL for me in 36.000+ miles.

Bolt the anti fouler directly to the test pipe and then the mini cat.