id go with arp studs before you think about higher performance injectors. your asking to blow the heads off of it if you put them in before studs. but if you want a good company for injectors id say industrial injection. thats where im getting mine from down the road. i personally wouldnt go with rcd being all the bad stories ive heard and seen a buddy go through IMO and yes i would recommend the airdog II great thing to have!!!