Patent pending stealth technology No computer needed to adjust EFI when additional fuel delivery is needed when modifying engines Tap-on stealth technology (doesnt interfere with stock ECU map) Uses carburetor tuning logic. Simple to adjust with a screw driver Increases horsepower Improves throttle response Simple plug-in design installs in minutes with factory type wiring harness LED lights indicate fuel delivery settings while tuning Wont interfere with stock sensors and inputs Compact size - 3½ long x 1Ύ wide x 5 /8 thick