The exhaust on my 79 650Z is absolutely knackered ie. my 4-2 is about to become a 4-4, I've been looking for a new/better one for over a year now (remembering in Aus the 650 is as rare as rocking horse sh!t), about the only option I can come across that I like is a Marshall Deeptone, in US they are about $500 in the UK they are 300GBP, in Australia they are $995. F#(%ing typical, we have to pay twice the price, the suppliers in the US and UK won't ship to Aus either. Anyway, I was thinking I would just take the exhaust off the 82 650SC (a future project) I have in my shed for the time being till I can save the pennies for a new exhaust, but I found out after a fair bit of cursing and swearing that the exhaust off an 82 won't fit the 79.