The Alliance Reman 7650 injector is a great fit for the every day work horse and works great for anything in the 400-650hp range. This injector was a factory offering in the BK Premium model 12.7 Detroit. Since this model has the newer style 9 hole nozzle providing a finer fuel atomization than a comparable 8 hole injector, this is a great choice for most Series 60 enthusiasts looking for a clean burn and a significant power upgrade over OEM low hp model injectors. Alliance injectors are available nationwide making these a great choice for warranty purposes!