I don't know just grabbed those off the web, they are not mine. I was just illustrating the exhaust. The GT550 I had (traded it for a Norton) Was a 74 or 75 I think, looked like the blue one though. I still have a 76 GT750 (water Buffalo) and 2 GT380s but those are junk and had many parts robbed off of them. One of the 380 front ends is on a 67 Bonnie hardtail I built.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!