Where is everyone going for a catalytic converter for older model cars.

I have an emissions test coming up this July and was wondering if I fail it, where should I go.

I have them every 2 years in Ontario.

I did great 2 years ago but, the car has travelling another 55,000 kms since then.

Go OEM, aftermarket, ?.........

Please tell all.

Thanks,

Mike McKinney

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1989 300CE - 269,000 km
1994 SL600 - 59,000 km