this is a gas given off by the burning of chemicals in your engine, and it sounds like .your lead foot is more of the problem. I believe your car is not burning cleanly at high rpm, take it in, get a major tune up, all new filters including a fuel filter and then take it out and drive it for awhile giving the computer a few weeks to get used to the new tune. Problem solved. The cat should be fine its still new enough to be working good for a while yet. But whatever you do, find some old race car driver, or a shop with the right mechanic who can tune it for how you drive it. you may have to ask around town, try for some old timey toyota mechanic with racing experience.
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