MegaSquirt 3 Programmable EFI Engine Management System with MS3X Expansion V3.57 - Assembled by DIYAutoTune 8 Sequential fuel injection outputs MegaSquirt 3 8 Logic level 5 volt ignition outputs 4 Switch inputs Free tuning software allows for real time tuning and data logging for later analysis Built in 2.5 bar MAP sensor reads up to 21 psi of boost