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running open headers is extremely loud
the reason for exhausts is to 1. quiet exhaust noise and 2. to filter out hydrocrabons etc. via catalytic converter 3. vent exhaust gases away from the motor and passenger compartment
a cat causes restrictions no matter what kind it is (thats why people hollow cats or even run open headers) so yes he will see a slight decrease in power but this way is legal and less of an annoyance
tho v8 open headers are fun to listen 2
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