360 la headers & straight pipe

I agree, Fir Max Power, and have read a few articles pertaining to that. Just seems to me, open headers, or headers with some length of pipe, Jack's Yer bottom end.... yes it's nice on the high side of the RPMs... just my perspective....Ain't gonna say much else, I Better "Follow the Science" lol

You aren't necessarily "wrong", that is generally how it works because hardly anybody bothers to bolt 3-foot or longer collector extensions onto their headers. Backpressure and velocity are directly related, think about if you've ever been drinking through a straw and you pull the end of the straw out of your mouth before stopping suction, your drink will continue to flow out of the straw and spill on your face and shirt lol. The longer the straw is, the longer the column of fluid and the stronger the effect is. BUT the longer the straw is, the more force is required to draw the same amount of fluid through.