The primary reason I brought the MaxSFI ECU was to market was to provide an all in one solution for the Air-Cooled 4 cylinder engine. With a standard MS2 or MS3 there is a need to install additional circuits for common modifications like wasted spark, boost control, launch control and even a tach output. This was frustrating because almost every package I sell gets at least 2 of these basic features. After countless ECU builds I decided to take the steps necessary to come up with a solution. I based the MaxSFI off of the Microsquirt module which includes all the licensing I needed to incorperate all these features into my own product and is perfectly suited for a 4 cylinder engine. Have a look inside.