I am the last one you would call daring rider, let's say I don't tilt the bike much, but the mac header is still grinding on the road during a turn every so often.
Is it a matter of all exhaust headers or just Macs? I have 18" in back and 19" in front, home made straight muffler but the grind is on the spot of 4 - 1, it is not my work that gets eaten by the road.