Standard exhaust is "3 into 2" (one into one (left) and 2 into the other(right)). TOR refers to the mufflers only. TOR mufflers will be marked "for off road use only" and carry a Triumph part number. (Triumph Off Road.)
For future reference, my US spec T'bird TOR pea-shooters have a "disclaimer" etched in. Old pic I just happened to have below. Polishing them has lightened it a good bit, but still visible if you look close.
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