Headers

[yuyokatana]

Good Day to all

Here is my question. I am planing on install headers to my 01 non S Boxster. The headers are without cats but they have the holes for both O2 sensors. Also I am going to eliminate the rear 2 cats or resonators with bypass pipes straight to the factory muffler. Will installing headers without cats triger a CEL light/ Even tough both O2 sensor will be installed on the headers? Can I do that? Please help me clearing my question, I am Active Duty Military and about to be deployed and want to do this during my Christmas vacation. Thanks in advance.... Angel...

[Guest]

Yes you will. The O2 sensors will read the same values and you will get a bad cat CEL. if you have the money get the Nhp midpipes with sportcats for 750$. They are not restrictive at all. I have them with noncated headers on the 3.6 conversion.

Sergiu

[Loren]

On US cars you will get a CEL if either the before cat or after cat O2 sensors are not present.

You can program the DME for RoW (Germany) as I recall and it will ignore the O2 sensors after the cats but you will still need the front O2 sensors.

Many dealers will not do this as they do not want to get in trouble with the EPA - so if you decide to go this route find a good independent to do it.

To re-program the DME you will need your IPAS codes from a dealer - usually these are no charge with proof of ownership at any dealer. Once you have the codes protect them because the owner of those codes can program keys to the car.

[yuyokatana]

Thank you guys for the quick response. Hereit is my confusion with your reply.

Loren... You said that On US cars you will get a CEL if either the before cat or after cat O2 sensors are not present. But in my case both O2 sensors will be installed on each header.

Sergiu... On your car then you have a non cated header with 1 O2 sensor on the non cated header and 1 O2 sensor on the NHP midpipes, correct??

The reason I want to install headers is because after troubleshooting i have found that the drivers side Catalyc Converter on the factory header (1 piece header and cat)is bad (code0430) I already cleared the CEL twice and the same code comes back. On my car the passenger side Catalyc converter was already replaced by Porsche under warranty(8yrs or 80,000miles) but with my luck now, the drivers side is bad, but the car is over 80,000 miles and the warranty is over. And for me doesnt make any sense to buy a factory header/cat for almost 1k.

[Loren]

Here in California with biennial smog certification you wouldn't get away with no cats.

Have you tried Sunset Imports (Porsche Parts at Dealer Cost) for a better price.