Description :

CARRILLO Conecting Rods PRO A Design For EJ20/EJ257 WRX/STI (3/8 WMC Bolt)

Bolt Size: 3/8 WMC
Length: 5.137 in / 130.50 mm
BE Bore: 2.165 in / 55.00 mm
PIN DIA: 23mm
Weight Grams: 509 / 369 / 140

Carrillo is acknowledged as the world leader in connecting rods. Thorough research and development of individual engine applications take into account the engine's architecture and the loads it will see. You will see no "one size fits all" forgings, which ultimately add reciprocating weight and stress to the engine. Although other companies have copied the look of a Carrilo Rod, it's the metallurgy and ultimately determines teh strength of the conencting rod.

Carrillo uses proprietary chrome, nickel, moly vanadium alloys purchased in lots of 100 metric tons. This is a custom designed material meeting all vacuum arc re-melt ASTM standards. The heat is validated, both by the supplier and an independent metallurgist to confirm the physical and chemical propoerties of steel. All heat treat processes are via a mar-aged operation resulting in UTS of 195,000 and a yield of 182,000 while maintaining the critical element of low notch-sensitivity andductility. All critical CNC machines at Carrillo or equipped with probing to accurately validate dimensional integrity. Each part is magnafluxed at least twice. Each piece is Rockwell tested to validate teh heat treat.

A final 200% shot-peen operation completes the part. Rod bolts are jointly designed by SPS and Carrillo. H11 tool steel w/220,000 UTS as well as Multi-phase 285,000 UTS are the materials used. Each fastener employs a patented thread design as well as the highest dimensional integrity in the industry. Each lot is sample tested destructively as well for UTS and Fatigue.