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Old 03-17-2004, 05:06 PM   #68
AzCivic
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Join Date: Feb 2002
Location: Az
Age: 44
Posts: 3,804
someday you may ask yourself why do headers sometimes have a special coating??

well HPC(high performance coatings) has the answer:

Performance gains from increase exhaust gas velocity, improved airflow, and reduced ambient under hood temperature
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