nice the short and sweet answer from just me is why not step headders dave it will not take much more work and the step tube is a over lap joint to the next size tube so there is abit less work. funny thing is i have never look at any thing from Dave V .so if i said that i have found out that equal headers almost never happen . the frame or front end parts get in the way .i had one customer drag s10 truck did run faster with a set of my custom long tube headers then his old hooker comp headers my tubes headder were not equal tubes so it has been proven to me at the track . there has been many set that i could never get them even .like chevy II with stock front ends with rise port bbc and many others i try to get it out of the head with nice flowing bends out of the the EX port and if you step the first step should be about 12 inch or so i have done some step tubes but do not have any thing to back them up. you would have to make two sets of headers the same but one step them dyno them out back to back .i think the power of the header is at the collector . the sad thing is i have built many sets and never seen any one try dif collectors but all of them big tube and step have work good enough not to play with them? just lucky