What year CB750??? If your bike is an early model and it's very stock already, then I'd suggest that you bolt the original 4-4 pipes on it, as it would be worth a heck of a lot more in market value.(and I have to say I like the OEM exhausts on those early K0 and K1 too...though I know those OEM stock pipes for early CB750s are REALLY expensive nowdays)
However, if you're making some kind of a 70's Cafe Racer out of it, then I suppose this would be a non-issue.
