As I understand it the option was called N-25 & was available in '71 & '72. Other than that it came on the '70 GSX prototype & had Olds 442 exhaust trumps, chrome tips. I see core bumpers going for a G-Note + & then you need the talipipe extensions, the tailpipe hangers & exhaust chrome tips. Could get to be a VERY expensive proposition. The hangers are being re-proed right now. I don't know about the tailpipe extensions or the chrome tips.
Tom T.
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