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Just wondering if my 1978 xs 400 can be repacked, it has 3 pop rivots on the back of each muffler so I would think so, but I'd like to confirm before I drill them. Thanks in advance.

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Just wondering if my 1978 xs 400 can be repacked, it has 3 pop rivots on the back of each muffler so I would think so, but I'd like to confirm before I drill them. Thanks in advance.

I would say that's an after market exhaust as original yams were welded.

I would go ahead and do it but don't over do it as you'll strangle the performance

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