Manley Pro Series Turbo Tuff I-Beam connecting rods are forged from aircraft quality 4340 vacuum degassed material. Each rod is fully machined to the highest standards. The Turbo Tuff design has appropriate weight and strength in mind for high horsepower applications. The rods are shot peened and magnafluxed after machining. Cap fasteners used are 3/8" APR 2000 cap screws.
