New pipes, new backfire. Why?

[qslim]

Got my shiny new VH 4-1 on, looks badass, sound great, shaves a solid 40lbs. Can't beat it!
Buuuuuutttt........ During engine brake, it backfires like crazy. I think that it may have done it a little from time to time with the stock pipes, but now it sounds like freakin' thunder. I don't mind it, I just don't know if its a problem or not. Like I said, won't backfire when accelerating, idling, or cruising. Only while engine braking. Maybe it always has done this and now it's just amplified by the megaphone? Maybe I don't know what I'm doing. Anyway, thanks.

[Motoplas]

Back firing through the exhaust when braking is due to an air leak normally around where the headers go into the head.
I had the same trouble on my race bike, the bracket holding the can was too long, which was holding the pipes away from the gaskets.
Noel

[qslim]

Well hot damn, Moto. You are a genius. As soon as I fired it up tonight one of the headers was definitely leaking right when I started it. Like a loud click-click-click that quieted after 20 seconds or so. I didn't have time to screw with it today, so I rode it home, but I was going to take them back off tomorrow and make sure everything is fitting correctly. You da man.

[mlaalm]

Order up some new gaskets if you hav'nt already . . . not too expensive

[qslim]

New gaskets are on the way, but in the meantime is there any damage to come from riding with this condition?