07-16 SUZUKI GSXR1000: Bazzaz Z-FI Fuel Control Unit Unleash horsepower, torque and throttle response by controlling air / fuel mixture from injectors, especially after making any fuel-related modifications, including exhaust. Developed in top level, professional racing, the Bazzaz Z-Fi Fuel Control Unit takes operational command of all fuel injectors, not just half like the competitors. This is a significant advantage in realizing the perfect tune, resulting in significantly better throttle response and overall engine performance. Z-Fi is a plug-and-play unit that piggy-backs onto the stock ECU. Each unit comes with a specific harness for each bike that utilizes O.E.M.