They came with some info etched into each injector making me think they were flow matched at one time, when I bought them, he said he thought they were old style Lucas injectors. I also bought a used s1x cam off of the guy, I only paid 160 for the cam and injectors, so I'm not too upset. But I wish he would've kept his word and got the info for me, I drove from Columbus to Cleveland to buy the stuff from him. I've done some research on the injectors and have verified they are 42lb for sure. But I've seen a lot of people use them on seadoo jet skis and other weird applications.