Does anyone know if the 2nd cat for the gt and st is interchangeable? Like bolts on and off?

or off any other cars? Like Camry?

It should be as long as its coming from the same type of motor I know that parts from the toyota corolla dx fit the 7Afe motor since I have a st model not sure of the 2.2 gt but it should be the same the one thing I noticed with mechanics is that most of the time they don't wanna replace the 2 oxygen sensor since its quiet a bit of work to get to it. Just to unplug the sensor you have too remove the passenger seat and I guess its to much work for them lol I did it my self and after getting it done no need to replace catalyst

I doubt it since the GT and ST use a different size exhaust, but it's possible. I'll have a look on ToyoDIY later.

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true.

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Same here. Would be nice if you can check.

GT:
09/1993-11/1997: 18450-74450
12/1997-1999: 18450-74680


ST:
All Cali spec:
18450-01090
18450-01110
18450-16670
18450-16680

So in short, not compatible. The parts diagram shows them looking very different as well. This is a '98 GT compared to a '97 ST.

Damn. Aight thanks. Was looking to pick up a used old one locally. And hallow it out.