Cat delete & O2 sensors?

[jacabean]

your secondary cats are not monitored. they are after your 02 sensors . you will not have any CEL .

Originally Posted by Timco

So besides a UD pulley, I am getting lots of peer pressure to do the cat delete as well. Gosh, this site takes me back sometimes! (Just do it, you'll like it....)

So....

1) is it legal to remove the cats?

2) if I tie-wrap the O2 sensor under the car, why does the false ambient air reading not cause the car to throw CEL codes? Why does the straight air not cause the car to mix or run different?

I just need all the facts before heading down yet ANOTHER fork on Boxster Road....

Thanks, Tim

[stephen wilson]

You can replace them with high flow cats. , though this is a more expensive option. Why would you feel pressured to do this? If you don't care about the few H.P. it MAY gain (especially without a "reflash"), just drive it as is and enjoy.

[Timco]

Originally Posted by stephen wilson

You can replace them with high flow cats. , though this is a more expensive option. Why would you feel pressured to do this? If you don't care about the few H.P. it MAY gain (especially without a "reflash"), just drive it as is and enjoy.

Oh, I kid. Every time I think heck, it's a Porsche, its fast enough, I see the same mods listed in sig lines. Then it turns out to be a quick, affordable mod that gives better sound, power, and access so it gets added to the short list. I'm not a track guy, but many of these simple upgrades like the pulley and these pipes are almost no-brainers.