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Chaz Davies has maintained his spot at the top of the timesheet ahead of the Kawasaki duo of Tom Sykes and Jonathan Rea at Imola.
The Aruba.it Racing Ducati continued to chip away at his lap times while also producing impressive race pace during the middle chunk of the afternoon session.
The Welsh rider pulled out a third of a second advantage over nearest challenger Sykes with a 1m 47.014s, while championship leader Rea ended the day one-tenth further back in third.
Despite not improving on his top time from FP1, MV Agusta's Leon Camier maintains his position at the sharp end by finishing fourth overall to keep his momentum from scoring his best career result with the Italian manufacturer at Assen two weeks ago.
Althea BMW pair Markus Reiterberger and Jordi Torres continued to impress by rounding out the top six ahead of IodaRacing Aprilia's Lorenzo Savadori.
Sylvain Guintoli, Davide Giugliano and Matteo Baiocco completed the top ten who will automatically progress into Superpole two tomorrow, leaving Alex Lowes to narrowly miss out in 11th.
It was a difficult day for Honda Racing duo Michael van der Mark and Nicky Hayden who could only manage 14th and 16th on the timesheet respectively, split by the Milwaukee BMW of Josh Brookes.
In the opening stages of the afternoon session both factory Kawasaki riders enjoyed instant lap time improvements with Rea jumping to second, just 0.003s off Davies' top time from FP1, and Sykes in third.
As the session moved into the middle third riders concentrated on longer stints as track conditions are expected to be similar for this weekend's races. The leading trio of Davies, Rea and Sykes consistently produced high 1m 47s lap times which could point to the championship contenders battling out for the rostrum places.
At the midpoint Davies produced his first improvement in lap time since FP1 to extend his advantage at the top to almost half a second before being marginally reeled in by Sykes, but the Welsh rider maintained his top spot at Ducati's home event.