the summit brand ignition boxes are made by mallary summit or jegs dont make anything they just have someone stuff it in a summit box the only difference i see is sometimes the part is not as shiney or smooth thats like their pushrods they are trickflows summit now owns trickflow thats like mr gasket mls head gaskets are made by cometic but packaged by mr gasket so if you dont need a major name on your box then summit or jegs are the way to go