K1 Technologies forged connecting rods and crankshafts are built from 4340 steel with a focus on tight machining and consistent quality for racing and rally use.

Connecting Rod Highlights

• 4340 steel construction
• Bearing bore tolerances held to +/- 0.0001"
• ARP hardware only (ARP 2000 standard; 625+ upgrade optional)
• Bronze bushings to reduce friction and support longer service life
• Press-fit pins available on some rod sizes
• 100% designed, finished, and inspected in the USA
• Honed at the manufacturer’s facility
• Weight-matched sets; rotary, reciprocating, and total weights marked to aid balancing

Crankshaft Highlights

• 4340 steel construction
• Hardened cores for increased tensile strength
• Polished and nitrided bearing surfaces for increased wear resistance
• ARP bolts installed and torqued to specification prior to honing for accurate, repeatable bore geometry

Product available for order.