Instructions for BM3 Flex Fuel Kit Install - F-Series S55 and N55 OEM Fuel Hat Location (Video taken on an F80 M3):
https://www.youtube.com/watch?v=lvYHQIlF1-g&ab_channel=KiesMotorsports
Instructions for BM3 Flex Fuel Kit Install - F-Series B58 and B48 OEM Fuel Hat Location (Pictures taken on a 2016 BMW 340i):
Instructions for BM3 Flex Fuel Kit Install - G-Series S58, B58, B48 OEM Fuel Hat Location (Pictures taken on an A90 Supra):
BM3 Flex Fuel Kit installation video on a BMW G80 M3 S58 (G-Series B58 and B48 OEM Fuel Hat Location Kit):
https://www.youtube.com/watch?v=qyAn7RvjJ1E&t=106s&ab_channel=bootmod3