I have fitted a Dyna Exhaust and it sounds wonderful. I bought two off ebay. The two pipes were not the same at the end. One was bigger bore inside, than the other, even though they came off the same Harley. Which is the best one to fit?. They both also had cats. No backfiring when I shut off either. I fitted the biggest bore. But I was wondering if the other would be any quieter. I bolted it straight on the mount with no problem and it looks great. The thing is though I do not have the original rubber grommet that sits in the mount with a collet, Should I get one or leave it as is. I am a bit worried over things cracking with fatigue/vibration. Oh by the way my bike is the LS400.

Serowbot wrote on 08/28/13 at 09:47:45:


Thanks for the reply. I will leave mine as is then. Just a bit tempted to try the smaller outlet to see if it is quieter.