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Turbo Tuff I-Beam Forged Connecting Rods

Manley Turbo Tuff I-beam rods are designed specifically for the most demanding turbo and nitrous type applications. Forged from 4340 vacuum degassed material, then shot peened, and 100% individually magnaflux inspected. Available with 3/8" ARP 2000 or Custom Age 625+ fasteners.

Sold in sets of 4 rods

Usually ships in 2 to 3 days.

Manufacturer: Manley


  • Subaru EJ20/EJ25 w/ 52mm Crankshaft Journal

Are H-beam or I-beam connecting rods better? The choice of I-beam versus H-beam is really dependent on the type of loads the rod must withstand and other considerations. It is impossible to make a generalized statement that one is always better than the other. For the most part H-beam rods can be designed to better provide the stiffness and rigidity necessary in a turbocharged application where compressive loads are quite high while I-beam rods can be made more suitable to the high tensile loads of a high revving normally aspirated application. Of course this is a simplification. The Manley Turbo Tuff I-beam is completely adequate for even extreme turbocharged application but it does come with a bit of a weight penalty compared to some high end H-beam rods that have bene weight optimized for the application.

Which rod bolts should I select? ARP 2000 bolts are the standard material ARP uses for their rod bolts while Custom Age 625+ is a special super alloy with about 30 to 40% higher tensile strength and excellent fatigue cycle life. The choice will generally come down the engine build budget and the application. High RPM and extreme power applications should definitely consider this option.

What is the weight of this rod? 590 grams.