Being sick of looking at the old rusty heat shield, i bought a can of high temp spray paint and was gonna give it a fresh coat of white, but as i took it off, i noticed there was a decent crack in the exhaust manifold/header, whatever it is...is this something that could get worse, and what could eventually happen? if i have to buy a new one ill most likely go after market rather than a junkyard. are e-bay, no brandname headers ok?
