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Old 03-21-2020, 12:41 PM   #1
HeavyHauler
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Join Date: Nov 2011
Location: USA
Posts: 411
Are cast iron manifolds that much more quiet than headers?

I dont think that I have ever owned a car with cast iron manifolds before. Will the cast iron manifolds be all that much more quiet than a set of headers if you are running the exact same mufflers for instance a set of flowmaster 40 series?
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