This is 3D printed from a full size model of the Rover V8 engine block. See the last two pictures.
Land Rover Defender Door Handle (Both Sides) 3D Printed
Defender rotating air vent 1983-2006 3D Printed PAIR
Smart fortwo 450 cold air intake 3D printed £28 free postage smart car
R53 R52 MINI Cooper S GP1 Intercooler Cover – 3D Printed Reproduction
Webasto Smartcontrol Multicontrol Button Knob 9030911B 3D Printed Rubber
BMW M52TU M54 M50 Air intake Gasket 3d Printed TPU set of 2