Exhaust/Test Pipe Questions

[Cunningr]

Originally Posted by 10/10ths

...Circuit Werks secondary cat delete pipes with the FVD Brombacher “Sound Version” exhaust and it is THE PERFECT street sports car exhaust.

Do you have any cel issues? Was reading a post on pedros forum said the cel fix these guys use just mask cel issue. The price is right though, i had originally thought of same setup. I want more sound but not to over board.

[Cunningr]

Looking at the Circuit werks exhaust bypass they have 2 versions. 1 has CEL error fix and the other looks standard. Not sure what the fix is curious as to which one to purchase and what is the difference compare to the FABSPEED?

[kk2002s]

So my 02 S has 4 cats, I think that is typical. The first cat has a O2 sensor just ahead and just after this cat. So the delete pipe is after all this. Now my Delete pipes came with a O2 sensor hole and plug about mid way. So I'm speculating that some boxsters have a different Cat/O2 sensor configuration where a O2 sensor is either farther down stream or after the 2nd Cat. Then I can see CEL's in your future

stevedOx
"...I don't think so, I think the SAI is separate from this..."

My thinking isn't that the SAI system is influenced, its how is the 2nd O2 sensor warm up effected with better flow from the delete pipes. If that 2nd O2 takes longer to warm up and the SAI shuts down, the monitor may see it as incomplete. Just a theory
I have more investigation to do

[Cunningr]

Originally Posted by kk2002s

So my 02 S has 4 cats, I think that is typical. The first cat has a O2 sensor just ahead and just after this cat. So the delete pipe is after all this. Now my Delete pipes came with a O2 sensor hole and plug about mid way. So I'm speculating that some boxsters have a different Cat/O2 sensor configuration where a O2 sensor is either farther down stream or after the 2nd Cat. Then I can see CEL's in your future

stevedOx
"...I don't think so, I think the SAI is separate from this..."

My thinking isn't that the SAI system is influenced, its how is the 2nd O2 sensor warm up effected with better flow from the delete pipes. If that 2nd O2 takes longer to warm up and the SAI shuts down, the monitor may see it as incomplete. Just a theory
I have more investigation to do

I did some reading on the fabspeed site as they have a mod for possible cel errors from cat delete also, basically said what you did about tempature. But i think theres adds a co2 filter as well.

The fadspeed are pricey but look from pics to be better built. Wish we had a good comparison.