Txdieselkid no offence taken on your point with J. R's injectors. I have first had expereince with Don's and would love to share that they really work well. The EDM injectors really smoothen the power delivery they come on so sweet and just carry the power right up its amazing. They work so much better then say DD or BD injectors in smootheness smoke and power its increadible! I cannot say one bad thing about Don and his injectors to me they are worh every penny as Im sure J. R's are.