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Old 07-02-2001, 10:20 AM   #1
Scooby Specialist
Member#: 1176
Join Date: Mar 2000
Chapter/Region: MAIC
Location: Potomac, MD
2012 MB E550 4M
2015 P85D

Default Thermal wrap protection! GOOD OR BAD

I was wondering, I just purchased and received my Borla header and would like to know it wrapping it with thermal material would be a good thing...vice versa the intake tubing too!!!

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Old 07-02-2001, 10:28 AM   #2
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Location: Ventura, CA


You'll want to hit the ol' 'search' function. This has been discussed before, though each side held to it's own opinions in the end.

The wrap will hold in heat, as it is designed to, but the effect it has on the metal of the header can be very dramatic. Less so with the stainless, but it still really isn't recommended. Basically, the retained heat changes the composition of the metal in the header, breaking it down over time. Contact Borla and ask their opinion.

FWIW, buying enough wrap to do the header is probably nearing the same price to get the manifold ceramic-coated. Ceramic coating is inside and out, so the heat (on the inside) doesn't get a chance to sink into the metal. I plan to go this route if my MRT system ever arrives.


Last edited by Julian; 07-02-2001 at 03:59 PM.
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Old 07-02-2001, 02:39 PM   #3
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The wrap will also hold in moisture. Your header's won't last long, wrapped. Ceramic coating is the way to go, if EGT is an issue for you.
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Old 07-02-2001, 07:32 PM   #4
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Location: Toronto, Ontario, Canada
1999 Impreza STi v5
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There's a Good article about the misuses of exhaust wrap

Mind you, there is some truth to it, but the explanation as to why misusing wrap causes those nightmares makes sense.

I've put some wrap on my exhaust header and painted it for protection, I don't expect cracks or moisture to ruin it anytime soon.

It's all in the installation process.
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Old 07-03-2001, 10:20 AM   #5
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Header wrap WILL hold mositure and WILL make your header rust. Been there, done that. Get it ceramic coated if you want to keep the underhood temps down.
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