imported_loudsubz

They wrap around headers to keep the heat from entering the engine bay (I think) I have also seen it on some intakes to keep heat out.

Is it expensive? Where can you buy it.

EL_Sport

I've heard its not good for header's as the heat it traps can cause the header to crack. Not sure if thats true though. Most speed shops should be able to get it. I know I have seen it in the Summit Racing catalog.

bbarbulo

iTrader: (2)

It's thermal wrap, designed to keep the exhaust gas hot for better flow (as gas cools, it slows down), and it also helps heat up the catalytic converter to operating temps. I think it's cheap and any domestic performance shop will have it. I heard it's hell for the headers though, unless they are cast iron like some turbo manifolds.

[1sL0CiviC]

also heard it isnt good for places with snow? prolly rust, i dont know