The AK-47 | Fuel Injector skin was added to CS:GO in the Arms Deal 3 collection in 2016.
The Fuel Injector skin features a fluid dynamic design on the body of the weapon in red, black and shades of gray. The pattern is meant to resemble high performance fuel injectors.
The Fuel Injector is a rare Covert skin and very popular for its clean futuristic design. It has high demand and value on the Steam marketplace.