Procomp Electronics H-beam connecting rods are one of the strongest connecting rods available. Procomp Electronics H-beam connecting rods are perfect for supercharged and nitrous applications and incorporate a special dowelled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications. They are manufactured from aircraft quality 4340 Chromoly steel, x-rayed, and ultrasonically tested with all surfaces shot peened and stress relieved.