572 Build

I can't say for sure but from all the dyno sheets i've seen from other 572 builds, the 2 1/8" picks up about 50 ft/lbs of torque down low and only gives up 10hp or so up top over a bigger tube. I would think that it would like a 2 1/4" header and that is something we might play with on the dyno if we have time.