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Old 01-20-2012, 08:28 AM   #17
Hornung418
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Join Date: Dec 2010
Location: Bel Air, MD/ WVU
Posts: 1,013
My Ride: '04 MB ZHP
Quote:
Originally Posted by jblack03zhp View Post
What Bwallace said. Ebay, supersprint, bimmerbrake, etc. it doesnt matter. Whoever made it is neither here nor there in that aspect, its all uncoated metal. The extreme heat created by your exhaust gases transfer through the highly conducive metal, negatively affecting major compents of your vehicles engine bay that dont like heat so much; wire coatings, hoses, & the likes.

Sent from my DROIDX using Bimmer App
Old post I know...

But to clarify, a header coating job is to keep the hot exhaust gasses, well, hot, as not to allow them to cool. This keeps the velocity of the exhaust high resulting in better exhaust scavenging. If you want to protect "Major components," you need heat shielding.
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