I just aquired a set of RC Engineering headers from thr 70's in good condition that appear to be for the CB750..........
Approx, 12.250" C/C on outer 2 pipes and 5.1" C/C on the 2 inner.
Head tubes are all parallel, don't know if it is for a 750, all I know is that it doesn't fit my 550-
Also, the configuration would force you to run a plate with lines to an oil cooler/remote filter it seems...The header pipes are tight in the middle-
Can (silencer) is chopped just aft of the collector about 4", but besides some small dings on the underside of the collector (I was going to Mig) it seems 100% serviceable.
Anybody interested? If they are in fact 750 headers-
If the measurements sound CB750 I will take some pics-
Dents are not as bad as they appear, but they are there. The headers feel very heavy duty, and I have the RC can with baffle. I don't need more stuff around-