Honda to run old-spec power unit after testing upgrade yesterday

10:48, 29 Sep 2018
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The two Toro Rosso cars ran with new spec power units yesterday, but Honda have reverted the changes for the remaining sessions this weekend. Tanabe-san explains in a tweet how he felt the performance was promising but more work was needed. Pierre Gasly and Brendon Hartley finished 8th and 16th in FP2. 
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