So….more header talk….this had me scratching my head

I got around to making a few passes yesterday. I put 4.86 gears back in so this was the only change I did.

1.33 60’
6.16 to the 1/8
109.66 mph to the 1/8
9.75 @ 136 mph

before the big tube header,

1.39 60’
6.29 to the 1/8
107.56 to the 1/8
9.96 @ 134

there is no doubt that the bigger tube header is working. Quicker in all areas. More TQ and more HP

View attachment 1715966726
Is the pipe length and diameter after the collector the same as with the smaller headers?