Found this on a different engine wiki site:
J35Y4 (2013 – present) is a modification with the direct injection system. The compression ratio was also increased here to 11.5, and the cooling and exhaust system were improved. This engine was equipped with a VTEC system, that was triggered at 5,000 rpm. These changes increased the torque at low rpm, and increased fuel efficiency.
J35Y4 power increased to 310 HP @ 6,500 rpm, the torque is 369 Nm @ 4,500 rpm.
This engine was installed in Acura RLX.
18. J35Y5 (2013 – present) is an analog to J35Y4, but it installed in Acura MDX. The power is 290 HP @ 6,200 rpm, the torque is 369 Nm @ 4,500 rpm.
19. J35Y6 (2014 – present) is an analog to J35Y5, which was installed in 3rd generation Honda Pilot and Acura TLX. This engine was designed to replace J35Z6.