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Old 12-23-2023, 05:36 PM   #1
1972c10pu
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Join Date: Oct 2022
Location: Alberta
Posts: 3
Header shine

I installed some flow tech ceramic coded headers on my 383 stroker after the engine was installed. I put about 400 miles on them with breaking in my new engine. I know they say you should not do that when breaking in a engine. Then i decided to go with a efi system and then the shine turned into a dark grey color with in 40 miles. Any ideas what can lead too this?
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