Second step: Preparing your header!
My stock muffler looks like this:
You have two options now.
(1st: using a pipe cutter (

), cut off the silencer from the header. It will look like this when finished:

)
OR!!!
(2nd: use the pocket bike muffler attachment that comes with your fatty pipe [I am doing this one!!!!! The reason I chose this one is because the attachment is better quality the stock, and you will see later that this will make the appearance sleeker instead of using two different materials.)