Its not as pronounced in an inline compared to a V-style engine such as a Flathead. Mostly because the cylinder firing is farther apart in degrees of rotation(90 degress for V,120 degrees for inline 6)and scavenging from the shared ports isn't as much of a problem in the inlines as the V engines that are siamesed. Putting exhaust dividers in the ports of a Flathead helps scavenging when real radical cams are used....
