On my X130 the windows trick was disabled, I found an app (I think it is Carista OBD2) and using an android tablet and a Wi-Fi ODB2 dongle I was able to enable it, I was also able to change the unlock door to be driver then all doors instead of just all doors. There are more but these are the two I remember.
The "unlock" all windows trick works because there is a Chinese piggy-back JOBD dongle device that is installed behind the driver's doorcard that bypasses the default behavior of the locking mechanism - allowing the "double-pressing" unlock/lock to work in bringing the windows up/down. That device hooks up into the window switches by the driver's door switch console. The default behaviour of the Mark X does not allow for lowering of the windows by double-pressing the unlock button on the key fob.
These were never designed to be modified. You can make small additions like you mentioned but you will gain very little HP for the work IMO. If your looking for performance from these I'd roll with the 3.0 super charged version of these. If you can find one 👀
Cold air intake will only do marginally to increase HP. You can go for lighter tyre rims to reduce weight so that acceleration off the line can be faster. And carbon-fibre the crap out of everything you can, for things like the front hood.
You need the oil removal tool (65P-14) to remove the oil canister housing. Then, remove the oil drain plug. After draining all the oil, reinstall back the oil drain plug, as well as the oil filter within the canister. Torque back to specs... then fill up the oil from the top of the engine. There's a very detailed guide by Car Care Nut on RU-vid that the detailed steps. For 4GR-FSE - the oil you need will be around 6 x litres. On paper the specs will say 6.3litres of oil - but I found this to be only around 5.3lit. Because no matter how much oil you drain, there will roughly be around 1lit still remaining inside the engine system...
