What is the difference between 200-cell and 300-cell headers?

[AlexisRose]

Different emission levels: 300-cell: Vehicles with 300-cell headers have higher exhaust flow, resulting in correspondingly increased emissions. 200-cell: Vehicles with 200-cell headers have relatively lower exhaust flow compared to 300-cell, leading to lower emissions than 300-cell. Different sound levels: 300-cell: The sound from 300-cell exhaust pipes can reach up to 150 decibels. 200-cell: The sound from 200-cell exhaust pipes is around 100 decibels. Different exhaust combustion efficiency: 300-cell: Due to the larger exhaust pipes in 300-cell headers, some incompletely burned gases may be expelled, making it less likely to meet environmental standards. 200-cell: With smaller exhaust volume compared to 300-cell, gases are expelled through the exhaust pipes after more complete combustion, resulting in different exhaust combustion efficiency between the two.