Upgrading pipes and adding PCIII, I ordered a Ness Big Sucker, but after reading more, I think I should have gotten the BIg SuckerII sinc eit allows 20% more. Do I need to undo and reorder guys?

 

More air/more fuel, it only takes in what it needs in relation to your AFR. You would be fine with either.

 

Then why even change to another filter from stock? I have no clue how this works

 

Stock filter/backplate is designed for EPA requirements, restricting intake, limiting power.... therefore lowering emissions. Open up your intake and exhaust flow and feel the difference!

 

The stage II sticks out farther and you will wack you leg on it. I was going to get it for my bike but when I held it up to the stocker I got the stage I k&n instead.

 

Got it, thanks guys! I'll leave my order as is.