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**Accelo** · 03-07-2021, 01:01 PM

No primer needed.
I have used the POR high heat and after 3 years looks like the day I applied it.
Admittedly not a lot of miles on this motor, under 1000.
Blast and install with a brush.
Rick

03-07-2021, 01:01 PM	#17
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,199	Re: Media blasting exhaust manifolds? No primer needed. I have used the POR high heat and after 3 years looks like the day I applied it. Admittedly not a lot of miles on this motor, under 1000. Blast and install with a brush. Rick