So what are the advantages of each type of rod? Well, first of all you have to understand that the configuration of the beam is just one part of the equation. You also have to factor in things like rod material, length and finish. Well, with all these things being equal, typically an I beam connecting rod is going to be lighter in weight. Although I beam connecting rods are typically used on stock applications, the lighter weight also makes them desirable for higher revving, higher RPM applications where you want less weight in the reciprocating assembly. Conversely, H beam connecting rods are a little bit stiffer and rigid and that makes them ideal for higher horsepower, higher torque applications where there is going to be more compressive forces again this comparison only holds true if your comparing rods with the same material, finish, and length.