Last year I did a full checkup on the engine: that included new spark plugs, full de-carb, and I think I had a timing belt changed earlier in the year at 120K miles. The engine has been running smoothly with full power. I just keep wondering when my clutch is going to go...

Arrowhead Honda has always been fair with me. That catalytic converter was the most expensive part I've seen. The Honda oem part discounted off of retail was $500. The O2 sensor was just over $100. I'm paranoid about getting non-Honda parts, especially now that the car is just over 10 years old.

Besides, I don't have any experience on under-car work. I do my brakes and rotors, but I've never ventured under the car before.