I have a 2003 Heritage w/ EFI. It has a 95" kit and stage 1 heads from NRHS and an Andrews 37G cam. I didn't know much about setting up the discs on my SuperMeg exhaust when I first put this together so I ordered extra discs and I started with 26 discs and the end cap installed. When I took it to be dynoed the shop said the end cap was hurting performance so they removed it. That is where it is now but from what I have read on this forum I don't think that is right. Other reccomendations seem to indicate that 16-18 discs w/ end cap might be about right. I recently purchased an open end cap and I would like to try using that. Would 9-10 discs with the open end cap seem like a good set up? Any help will be appreciated.