Good day to all...question...my '99 Forester has the check engine light on and haven't had the time to check with the code reader, hope to get to it this week. Anyway, been reading up on the MPG and exhaust forums; I am getting, probably 15-17 MGP. So after reading up, I thought I'd check the catalytic converter. Not sure if I could physically see if it was ok or not, but I was surprised to see that the previous owner had put a hole:surprise: through the comb material. I read that some were saying, running without the converter is asking for burnt valve or other major issues. Thoughts ???