Gutted Cats?
Thread Starter
Teching In
Joined: Jun 2004
Posts: 11
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Gutted Cats? I want to gut my cats. I was just wondering if I would have to us o2 shims or if I could use the factory 02 sensor. What performance gains if any could I expect, also how much louder would it be. I have a magnaflow cat-back.
Thanks
Thanks
You will pick up a catalyst efficiency code because
the cats no longer make the rears different from the
fronts. The sensors are fine, the PCM is annoyed.
Pick up a set of O2 sims or get the test programmed
to not report the error.
the cats no longer make the rears different from the
fronts. The sensors are fine, the PCM is annoyed.
Pick up a set of O2 sims or get the test programmed
to not report the error.
Wouldn't gutting stock cats (or even the 'less square' aftermarket ones) cause a bad turbulence/swirl effect in there once they're emptied out.
I guess it's still better than having them as active cats but I think the proper way to do it would be to also put a 'straight pipe' through them.
I'm assuming you're looking to still show as if you have functional cats for visual/spot inspection reasons?
I guess it's still better than having them as active cats but I think the proper way to do it would be to also put a 'straight pipe' through them.
I'm assuming you're looking to still show as if you have functional cats for visual/spot inspection reasons?
An empty cat is now a resonator, some say
they sound pretty bad. At the flows I was
able to push with a leaf blower, though, a
gutted cat performed better than a high-
flow cat and worse than an offroad tube
of same fitment.
they sound pretty bad. At the flows I was
able to push with a leaf blower, though, a
gutted cat performed better than a high-
flow cat and worse than an offroad tube
of same fitment.
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