Made the decision to convert my car from a mefi 4b to a mega squirt 3 pro evo. Used amp efi LS harness from DIYautotune.com https://www.diyautotune.com/product/ms3pro-drop-58x-ls-plug-play-harness-w-ecu-evo/
I've been around 4 other cars that have the ms3 pro in them, very impressed with how...