Yup, a stepped header allows you to keep torque while not hindering your topend power. A compromise if you will, for a street/strip setup. If I was going full race, I'd probably go 2" straight through (maybe bigger depending on the setup, I'd probably run a bigger cam if it was a race car), if it was strictly a street cruiser, than maybe straight 1 7/8", or even a 1 3/4" stepped to 1 7/8", to maximize torque. But with the 4200 converter I don't need to squeeze out every bit of lowend torque, I can afford to sacrifice a lil on the bottom to have more power up top. Especially when I'm spraying, with an extra 300hp being added, the big tubes will really shine.