Hi all, I’ve got a 2013 FLD Switchback that came with a Screamin Eagle Nightstick slip on.

My old persons memory thinks they were like a super trap style - take discs in or out to change note and back pressure 

Fuggity  feck ! 

Thanks for reply, I understand that the more disks you use the back pressure decreases and the sound increases, but do you need a different baffle for the open end cap.

Have you looked at the Supertrapp site. They manufacture the Nightstick and sell core replacements and tuning (disc) kits which include open and closed caps.  Unless it’s buggered you won’t need a new core. Pull it out and check the glass mat. However, before you fit a closed cap make sure there are plenty of discs fitted. The stock pipe should have 10 discs. When you run an open cap the discs are superfluous (path of least resistance etc) but hopefully the discs were retained, if not, do not fit a closed cap.

Thanks Ratbob, I’ll check out Supertrapp’s site for sure.

1 x open end cap = 10 Disks.

Try show and go for discs  and caps online that’s who I used a few years ago 

Summit Racing is another place to look, ship to Oz, good deals at times

Thanks for all your comments.

On my 2:2 supertrapps I run 10 disks with an open endcap.  But thats on an Evo.

Thanks for the reply Tussok

The sound is a good deep rumble without being obnoxious.  

Thanks, I put 6 in, but after reading comments on other threads and this one I’ll change to 10 before I fit it on the bike.

Thanks to all those that gave comments, they were very informative.