True or False???

[GQ IMAGE]

Question. I was told by a 18 year Porsche Master Tech. that if I remove the 2nd set of cats on my 2000 Porsche Boxster S that the check engine light will come on.
Can this really be ture?

[mikefocke]

Really think you are going to gain that much HP with just an exhaust tweak?

[Pat]

Not sure about the Boxster, but this can be true with other cars. I think some of it depends on whether or not there are O2 sensors after the 2nd cat.

[spine911]

True, it is mainly because of the disconnected 2nd 02 sensor.

[Cloudsurfer]

On the Boxster, the secondary O2 sensors are after the pre-cats i the headers, not the secondary cats. The car cannot tell if the secondary cats have been removed.

Patrick

[boxstar]

Your 18 years of experience (or is it 18 years old) Porsche Master Mechanic is wrong. The O2 sensors are on the header cats (1st set) like bmwm750 stated. No way for a CEL to come on.