MAGNUMTUNING FACTORY DYNO-BOOST is a fully adjustable, INBOARD/OUTBOARD SPECIFIC fuel controller featuring an in-dash remote designed for all fuel injected boat engines controlled by ECU, simply wires inline with the IAT (Intake Air Temperature) also referred to as MAF (Mass Air Flow), MAP sensor. 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). This reliable boat Performance Chip will add 15 % extra horsepower improved economy & fine throttle response to your factory performance without any compromise of engine durability or reliability. Are you in need of great hole shot? Have a luxury cruiser or a swift powerboat or just want to get to your fishing spot fast? Dyno-Boost is the answer. Even people who are not technical minded will find, kit is not difficult to install just needs 20 minutes. It will not affect engine reliability & endurance. Remap factory engine or calibrate engine management to any performance ignition kit, intake, etc. preinstalled. EVO-TECH 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 & supposed 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%. Specific chips are sorted into several categories according to operating range / type of IAT / MAF sensor. 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.