hot enough that you will need to install something inside the muffler of your new Mega-line exhaust or it will blue/turn brown within 30 miles. I used a piece of 4" long scrap iron tubing and slid inside the muffler at the 3rd volume end.
Next time I take the bike for a decent spin I will shoot the 3rd volume w/my IR thermometer.
good idea! On my first top can "wicked-line" it turned brown a good 6" up the can. On the one I have on now I rode 15 miles before sleeving the can & it had already started to go brown. since installing the sleeve, it has not gotten worst.
My collector is over 11" long. I know that's not a lot of difference in temp LOL, but maybe. My can is still blue/white chrome, but it's a junk/experimental can that I will run for a while before replacing it with a new one.