These ARP High Performance series connecting rod bolts are made from seamless and defect-free 8740 chromoly steel. All ARP rod bolts are heat-treated before grinding and thread rolling and have a large underhead radius for greater strength.
Toyota 3.0L (2JGZE) Inline 6 (1993-1998) Supra ARP 203-6005 Connecting Rod Bolts. Pro Series Wave-LOC Rod Bolts ARP2000. For the most severe applications, in conjunction with aftermarket I-beam rods, ARP has developed the “Pro” Series Wave-Loc bolts.
ARP Pro series connecting rod bolts are precision CNC-machined to exacting specifications and designed for optimum reliability. They are heat-treated and threads are rolled to provide up to ten times more fatigue strength.
Toyota 4U-GSE 2.0L 4-cylinder Rod Bolt Kit