header size for stroked small block?

Running 1 5/8"-1 3/4" TTI step headers with TTI 2 1/2" H-pipe, Dynomax Ultraflos, and 2 1/2" TTI tail pipes to chrome tips. Does not drone. Not real loud and I picked up a bunch of power over the Dynomax Super Turbos that were on there before. Here is video:

[ame="http://www.youtube.com/watch?v=lhBrgD1K68A"]414 Stroker Cuda Pulling Out Of Garage - YouTube[/ame]