Can i install offical rom through twrp

Hello plz conform
That can i flash offical stock rom miui through twrp and not lose unlocked bootloader

Andplz provie me the link of 7.5 for redmi note 3 snapdragon stock rom
I am really confused in miui site
Plz provide both zip and fastboot rom

Huawei P8 Lite ALE-L21C185B160 TO ALE-L21C185B525 . IS IT WORKING ? IS IT OFFICAL ?

i have huawei p8 lite android version 5.0.1 emui 3.1 i want to upgrade to android 6 emui 4.0 the version on the page of huawei (consumer.huawei) . is it offical ?
my build number is : ALE-L21C185B160
upgrade build number is : ALE-L21C185B525
is it working without problems ? is it the final version (stable version) ?