Give your Megasquirt the ability to drive a boost control solenoid double up it's duty as an electronic boost controller. Includes all parts required to build the MSnS-E boost control circuit on your V2.2 or V3.0 PCB, including FET, resistors, heat sink compound, mica insulator, and mounting hardware. We've used it with MS1/Extra and it can also be used to build the MS2/Extra circuit. Works with many common boost control solenoids though we recommend the EBC boost control solenoid available here . We've run this exact EBC control circuit on the DIYAutoTune MR2 and countless other cars as well, all with great results.