If they're real HRC they'll be side by side and if they're HRC for an mc21 (i.e. made before 1993) they'll almost certainly not fit an mc28 without some tweaking.

But I'd still buy them; as it's the l/h pipe that will be causing the issue (the r/h pipe will obviously fit) it's only going to need a bit of heat to bend the stinger out of the way of the swingarm and then bring it back in line so the can doesn't poke out at a silly angle.
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