Carrillo SCR4245-4 Pro-H Beam Connecting Rod Set Subaru EJ18 EJ20 EJ257 WRX STI 3/8 WMC Bolt

The Carrillo SCR4245-4 is a premium Pro-H beam connecting rod set engineered for Subaru EJ18, EJ20, and EJ257 engines found in WRX and STI models. This 4-cylinder set features Carrillo's legendary Pro-H beam design, their strongest connecting rod configuration capable of handling extreme cylinder pressures and high RPM operation in forced induction and high-performance applications.

Key Features:

• Pro-H beam design for maximum strength and durability
• Manufactured from proprietary chrome, nickel, moly, vanadium alloy meeting VAR (vacuum arc re-melt) ASTM standards
• Includes high-grade H-11 tool steel WMC bolts with 3/8" diameter and 220,000 PSI ultimate tensile strength
• Heat-treated via mar-aged operation achieving UTS of 195,000 PSI with yield of 182,000 PSI
• Machined from oversized forgings for proper grain flow and removal of potential inclusions
• Precision CNC machined with dimensional integrity validated by probing technology
• Each rod is Magnafluxed twice and Rockwell tested during production
• Shot-peened finish for enhanced fatigue resistance
• Made in USA at Carrillo's Irvine, California facility

Carrillo connecting rods represent the gold standard in aftermarket performance rods, combining advanced metallurgy, precision manufacturing, and rigorous quality control. Founded in 1963, Carrillo Industries has built a reputation for uncompromising quality and performance in racing and high-performance applications. This Pro-H rod set is ideal for high-horsepower turbocharged builds where reliability under extreme conditions is critical.