I don't know whether BRM had ever done this before or since but they had 5 cars entered at Mosport in 1971.
Jo Siffert # 14, Peter Gethin # 15 and Howden Ganley # 16 in BRM P 160s and George Eaton # 28 BRM P 153 and Helmut Marko also.
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Jo Siffert

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Peter Gethin

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Canadian driver George Eaton in BRM # 28

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For all their entries it was not a successful race for the BRM Team as the best finisher was Jo Siffert in 9th position.

(Jerry Melton photos.. )

KH