The first step is cutting the piggies. Try that...then if you want more, you can drill out the rear baffles. Drill out one on each side.....then test ride. If you want more, punch out one more on each side. Still want more.....go ahead and punch out the last two (one each side).
The next step after cutting the pigs and punching the rear baffles would either be going ahead and punching out the front baffles too (which would require shimming the carbs)....or....doing the Ragnar Cut (which doesn't require shimming the carbs).
What's the Ragnar Cut you ask? Simple....it's using a hole saw and cutting out the rear baffles. It's a big step.....and if you want to go Harley hunt'n, then this is what you'll want to do.
Here's the instructions for the Ragnar Cut......
http://luiscajiga.com/Exhaustm2.htmbtw.....here's how to's for the piggy and baffle mods.......
http://www.valkyrieriders.com/shoptalk/Pipes101.htmhttp://luiscajiga.com/Exhaustm.htmHere's a video of my Valk with the piggies cut and rear baffle drilled out......
And after the Ragnar Cut......