X4, X-4 or x4 may refer to: * BMW X4, a German crossover automobile * Sehol X4, a Chinese crossover automobile * Honda X4, a Japanese motorcycle * Moto X4, an Android Smartphone * '' Mega Man X4'', a video game * Naish X4, a kitesurfing kite * The Norteños street gang *

Northrop X-4 Bantam The Northrop X-4 Bantam was a prototype small twinjet aircraft manufactured by Northrop Corporation in 1948. It had no horizontal tail surfaces, depending instead on combined elevator and aileron control surfaces (called elevons) for control in ...

, an early jet age research aircraft * A common name for petroleum ether * A four-lane

PCI Express PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe or PCI-e, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X and AGP bus standards. It is the common ...

slot * Ruhrstahl X-4, a German World War II air-to-air guided missile * Ultimate X4, a comic-book crossover in the Ultimate Marvel Universe * X4 (New York City bus), an express bus route * Stagecoach Gold bus route X4, a bus route in the United Kingdom * X4 virus, a T-cell tropic HIV * '' X-Men Origins: Wolverine'', a 2009 film * '' X-Men: Days of Future Past'', a 2014 film * WordPerfect X4, a version of word processing software * '' X4: Foundations'', a 2018 video game

See also