The units themselves seem to be nice as do the coolers. I'm not real crazy about their mounting systems so I'm making my own bracketry and plumbing on the M3 setup I'm putting together. I will be using my own fuel injection as well, so no worries about the blow through carb or the fuel pressure tweaking that ATI normally uses on their kits for EFI Merc motors. As with any boosted application, fuel delivery and timing are crucial, so whatever method you choose, make sure it's right!