Description Manley ECONOMICAL “H” BEAM STEEL RODS Manley “H” Beam connecting rods are manufactured from 4340 forgings to the same exacting standards developed and approved by our original equipment customers. There is a vast difference in quality between a Manley “H” Beam and the “other” inexpensive H-Beams on the market. Weight matched to /- 1.5 grams. Perfectly round big and small ends. Bend and twist is tightly controlled.
