Whats up. Ive been doing haruna takumi/trueno runs for a few years now for fun against myself since I dont know anybody that actually tries for times and communities basically dont exist for this game anymore. I prefer to have all assists turned off and of course manual transmission setting. My best takumi course is 2:24.87 and my best trueno (havent been doing it too much) is a 3:12.69. You seem pretty good but I think you have assists turned on. I dont really think it matters, but I wonder what your times would be without assists, you should try it and see if you like it without assists. Also if you'd like to play online sometime me and some of my friends use the Evolve software and it works without issue, and you can really easily modify the database file to get all cars on all tracks including haruna working on multiplayer. If you'd like to play online for fun hit me up my steamID is Zone0fEndless https://steamcommunity.com/id/Zone0fEndless/
I dont think my times are really as reputable as a non-replay time but I dont consider them special or anything so ill link them here. I mainly drive the Evo X because I am pretty sure its the fastest pro tuned car for the touge but I think the GT-R is fun as well.
Takumi downhill no assists
Trueno downhill no assists
P.S. I wish you could private message people on this site