I Used Dinqua's calculator. Awesome. That being said I have a few questions.

I have a 2007 Speedmaster with British Customs Bomber Exhaust mufflers and stock jet needles. I'm planning on removing the airbox and putting Dual K&N (Freak)on.

Do my mufflers fall under the "Misc Open Pipes"?
The Calculator says 120 for Main Jets with Stock Pilot Jets and Needles. Do I need to or would it help to change the stock Pilots and Needles?

Thanks for any help on this.

Opportunities multiply as they are seized. - Sun Tzu