Hello. I have a 1974 CB550 with botha 4into1 totally rusted pipe and a 1977 exhaust 4 into 4 system. For some reason I sold all the exhaust collars and retainers I had from my other 1974 cb550's. My question, do you think I should keep the 4into1 system on or replace it with the 4 into 4, if I can find the collars & retainers? The 1977 system does fit, but.....it's the wrong year. michel
