You can go with there's if you want. I just got my flex fuel sensor from them but I didn't get the injectors or fuel pump because I have the 65c pump already and 550cc injectors are too small for my set up. I got some ksm motorsports 650cc Injectors which are 150$ for 4 of em in there right now and they are doing great. I also have some deatschwerks 550cc injectors but I can't run them as they would be maxed out and you can only run aftermarket injectors up to 80% is what hondata recommend 85% is pushing it but after that they'll start getting stuck. I'd go with some deatschwerks or id's or whatever you feel comfortable with. Right now ksm also has 20% off but if I go with ksm ask for the deadtime and voltage info because it don't come with it.