2JR rod sets for the QR25 are extremely durable, lightweight and cost not much more than the factory B16 rod. All come with ARP rod bolts.

H-beam rod out of 4340 high tensile steel for QR turbo applications, good for up to 700whp. These are over 25mm in thickness. 

I-Beam rod is extremely lightweight I-beam rod from 4340 that is designed for all NA and low boost (less than 450whp) applications.

Principal Design Features AISI 4340 is a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Applications Typical applications are for structural use, such as aircraft landing gear, power transmission gears and shafts and other structural parts.

Tapered to Fit OEM / B16 and Frontier Pistons perfectly - as well as forged wiseco/je