The cans are shorter, not by much but enough so that they fit perfectly with the RC tail. At standard length, I felt they were just too long. As for the HRC/Akrapovic decal, it's not anything special, in this case, however I believe there are some products created by both parties.Are those Akra cans shorter than usual? They don't look like the normal length. And whats with the HRC on the stickers? Are these some sort of special edition? I like em!!