A few weeks ago we were talkin bout makin 'Shorty' can's,so I thought I'd do a run down of what you need to do, in case anyone want's to have a go & is not sure how to attack it.
"I should at this point mention that this is NOT a be all & end all guide so if you Fuck up don't blame me"
You'll need at least a Drill & usually a 4.9mm bit,an angle grinder with a 1mm thick cutoff wheel,a flap disk for the grinder is also handy,a small punch & something to hit it with,some 4.9mm stainless rivets & pop rivet gun,a file, a texta, a tape measure & steel ruler.
I'm sure I've missed something but we'll work it out as we go along.
The can I'm cutting down here is an Akrapovic oval Titanium,similar to the one above(I forgot to take a pic before I started).
First drill the rivets out of the inlet end,sometimes the heads come off & then they just spin,you may need to punch through any stuck ones so they clear the band & the outer skin,the band should come off (take note of where the join is),the inlet end should now pull out, this will take some force & can be tricky to grip onto,I use a small steel hook to pull from the retaning spring pickups,you may need help from a friend for this step.
The perforated core is attached to the inlet end( This is not always true for all brands)& will come out with it.
Some cans may require you to drill out & remove the outlet end as well to remove the core.
If the packing doesn't come out with the core,pull it out now.