Friend of mine had a BlueFlame can on his K4, we couldn't stop it from sticking out to one side.
Called Blue Flame and told them about the problem. Get the response "Ahh, I think we've sent you the wrong hanger, we'll send a new one", result.
A couple of days later an identical hanger turned up.
Still it sounded great.
Looked odd.
Most K4's (and later) I've seen with Blue Flame exhausts have had them sticking out.