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Discussion Starter #1
The car has 310K but still runs smooth and strong.

It had CEL P0420 CAT inefficient and the guy added an extender to O2 S2. After that tt never has any CEL and passed SMOG all along.

Recently I took it to a STAR smog station. It passed all criteria, but the guy looked under tha car at the CAT and failed it, noted TAMPERED CAT. Looks like DMV is crackign down, making SMOG Techs check the CAT for any mods. Damn.

Looks like I just have to replace the CAT. I searched eBay. New CATS are less than $100 but they dotn know if it would meet California's regs.

Any bro know where, what brands what model of CATs to buy for Celica GTS?

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