Removing cats

[clb0099]

I was talking to a guy from vertex who told me if i remove my 2 cats that are near my engine that i would gain at least 10 or more hps .. Has anyone have done this I am assuming that the porsche has 2 pre-cats and then 2 cats. Can someone clear this up and if it is true that i will gain some noticable power gain

[blue2000s]

Originally Posted by clb0099

I was talking to a guy from vertex who told me if i remove my 2 cats that are near my engine that i would gain at least 10 or more hps .. Has anyone have done this I am assuming that the porsche has 2 pre-cats and then 2 cats. Can some clear this up and if it is true that i will gain some noticable power gain

Call the guy back and ask if they have a money back guarantee if you check engine light comes on once the cats are removed.

[clb0099]

he told me that if you put headers in you have to extend the 02 sensor wires but if i remove the the pre-cats and don't do headers it will not set off the cel light or engine light the guy i was talking to was a gilbert. No offense but why would he give me money back on advice . He said that the pre-cats restricted the air flow and if i removed them that i would gain more hp but he didn't sell me sports cats or anything just told me that it wouldn't set off the 02 sensors.

[blue2000s]

Originally Posted by clb0099

he told me that if you put headers in you have to extend the 02 sensor wires but if i remove the the pre-cats and don't do headers it will not set off the cel light or engine light the guy i was talking to was a gilbert. No offense but why would he give me money back on advice . He said that the pre-cats restricted the air flow and if i removed them that i would gain more hp but he didn't sell me sports cats or anything just told me that it wouldn't set off the 02 sensors.

He wasn't trying to sell you a set of headers? The cats are part of the exhaust manifold, unless you're doing a bunch of fabrication, the only way to remove the cats is with headers.

The car's computer is looking for a difference between the upstream and downstream O2 sensor signals. If they both read the same thing, it'll throw a check engine light so I assume he's telling you to place the second sensor after to second cat? More fabrication.

[Brucelee]

I believe that removing cats is illegal in NJ.

[John V]

It is illegal, and you will also get a check engine light.