Honda's engine upgrade set to be introduced at this weekend's Canadian Grand Prix is centered around improvement of its internal combustion unit.
The Japanese manufacturer is cautiously taking its progress one step at a time as it subtly balances performance with reliability.
Both Toro Rosso's Pierre Gasly and Brendon Hartley will both enjoy the new spec unit in Montreal, hopefully to their benefit.
"We are introducing an updated PU for this event, fitting it to both cars," said Honda tech boss Toyoharu Tanabe.
"The updates are mainly to the ICE, focusing on improving performance. The Montreal circuit is known for its long straights, where over 60% of the lap is spent at full throttle.
"There are slow corners after the long straights and this means that good driveability is again important as is rapid turbo response," added the Japanese engineer.
"All these features mean that the power unit is one of the key elements here, which is why it has traditionally been the venue for engine manufacturers to introduce updates."
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