I would have to go look at them to tell you what brand they are, and yes they will work with the stock coolers, you just make the hole smaller.
The reason I didn't put them on is the snow on running board melts and you really don't need them with the stock coolers. I also felt it wouldn't cool as well with them installed, so unless you just want the traction I don't see the point.
I wish the guy selling them would have enlightened me, I bought them before I took delivery of the sled and hadn't looked at the tunnel and coolers or I wouldn't have wasted my money.
I'll sell them for half price 100.00 shipped lol...
Mike
