I am confused about the sizes of injectors everyone is using. What do they mean by 275 injectors?

 

the 275s are the stock cummins injector for a engine thats rated at 275hp some times found in rvs this is why they are comminly called the rv275s . the after market injectors are rated at what they are above the stock power level. IE a 130hp injector should add 130hp.

 

fill out your sig,so we know what your driving.if your thinking about injectors i would sugest going a size larger than you think you need.you will get used to the increase fast and will be left wanting more.i thought i wanted the 90hp,but soon found the 130hp much better.had them a few weeks and still love em.