HONDA iPhone 5/5S Cover. Honda Official Licensed Product. The B-Series engine is one of Honda's most iconic family of engines. Considered to be one of the most advanced inline four-cylinder motors of its time, the B-Series featured dual-overhead cams and Honda's VTEC (Variable Valve Timing and Lift Electronic Control). Some B-Series engine models were able to achieve a specific power output of 100 HP/litre. This was truly an amazing engine that laid the foundation for countless motoring enthusiasts worldwide. This iPhone case was designed to commemorate the B-Series engine. Inspired by the legendary valve cover, this 3D modelled case is made to fit the iPhone 5/5s and is sure to become a collector's item.