I've seen post from years ago about who has the highest mileage. I have over 463K miles and just in the last year have started putting serious money into repairs. 2 days ago I got a friend to put in plugs and wires. just asking your opinions on how many more miles can one reasonably expect to get out of a 99 4runner? I keep up with the preventive maintenance pretty good. The most problems I've had is in the exhaust. I'm in the market for a new muffler. I put one on last year and it's really loud. I want to replace it. Can someone tell me a good place to purchase an oem for a decent price. thanks in advance.