MAGNUMTUNING FACTORY Dyno-Boost is a fully adjustable, PWC SPECIFIC fuel controller designed for all fuel injected jet skis controlled by ECU, simply wires inline with the IAT (Intake Air Temperature) also referred to as MAF (Mass Air Flow), MAP sensor and plugs into the O2 sensor harness on rare models having it. Dyno-BOOST tricks the ECU thinking the intake air much more cooler, then the ECU will send more fuel for a richer mix. It allows you to fully adjust the Air Fuel Ratio (AFR). Peppy acceleration, excellent hole shot, 15% extra horsepower & torque, improved economy & fine throttle response. Even people who are not technical minded will find, kit is not difficult to install just needs 60 minutes. It will not affect engine reliability & endurance. Remap factory engine or calibrate engine management to any performance ignition kit, intake, etc. preinstalled. DYNO-BOOST increases HP by adjusting AFR between 12.7 & 14.7. Set advanced fuel trim, dialing a multi-turn screw. Adjustment needs no expertise. Chip modifies signals being read by the ECU, resulting adjustment to the AFR. Though performance chips are not especially for economy improvement & basically subjected to gain more HP, when modifying air fuel ratio, slightly at the expense of emission & noise level, efficiency of combustion is improved & you SAVE FUEL by up to 6%. This popular chip can even quickly be switched, removed or re-installed at any time. The operation of injection system is significantly determined on the signals of different sensors as IAT, ECT, MAP & Oxygen sensor therefore if we trick their signals we may regulate effectively engine output. Magnum TuningTM has been dealing with manufacture of upgrades since 1994. Magnum's experience warrants peak performance, reliability & perfect style. Magnum Parts are made in Europe & covered by 10-YEAR WARRANTY.