Eagle Specialty Products
At long last, Eagle has introduced their 4th generation design (4D) H-Beam rods. Racers are making more power now than ever before and the bottom end has got to be up to the task! Eagle 4D rods are designed to handle all the power you can make without breaking the bank. Design advancements include thicker webbing and thicker beam to improve tensile and compressive strength. The big end of the rod also sees several design improvements. Material has been added at the parting line, at the bolt head clamping area, in the "shoulder" of the rod, and the webbing on the cap is significantly strengthened. This improves big end rigidity tremendously. Under very high loads, the big end of the rod can become distorted ("egg-shaped") causing a loss in oil film consistency eventually leading to a breakdown in support for the bearing and spinning a rod bearing. Adding material in these areas solves this issue in very high power applications.
All Eagle 4D rods come standard with 7/16" ARP 2000 bolts - even 4 and 6 cylider applications! This is a 36% increase in bolt strength alone for those applications! All Eagle 4D rods are 100% CNC machined. Every surface! This provides unrivaled consistency in manufacturing that is unmatched by any large-scale manufactured rod. Finally, Eagle 4D rods are forged from a steel that has been 30 years in development. "4340" is an alloy formula conceived by The American Iron and Steel Institute (AISI) and adopted by the Society of Automotive Engineers (SAE) and the American Society of Mechanical Engineers (ASME). It is the material of choice for connecting rods and crankshafts in the high-performance industry. Eagle has spent the last 35 years establishing a very good relationship with their steel foundry of choice.