How do you determine the optimal cutout dimensions where the X pipe halves meet? Eyeball it? I think the size and shape must significantly impact whether you get good velocity and scavenging vs. increased turbulence.
Kean?How do you determine the optimal cutout dimensions where the X pipe halves meet? Eyeball it? I think the size and shape must significantly impact whether you get good velocity and scavenging vs. increased turbulence.