My .'72 is the same as above with a T piece, but in my vague collection of memories, I'm sure I've seen a set up like yours with a hard link pipe between rear cylinders. so it may be a factory fit.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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