Carrillo SCR5155-4 Pro-H Beam Connecting Rods BMW M3 S14 Engine

The Carrillo SCR5155-4 Pro-H Beam Connecting Rods are engineered specifically for 1988-1991 BMW M3 S14 engines, delivering race-proven strength and reliability for high-performance builds. These straight H-beam connecting rods feature the stoutest beam configuration available, capable of handling extreme cylinder pressures and abusive racing conditions.

Key Specifications:

• Center-to-center length: 5.669 inches (144mm)
• Wrist pin diameter: 22mm, bushed full-floating design
• 3/8 inch CARR (Multiphase MP35N) rod bolts with 285,000 PSI tensile strength
• Weight: 566 grams per rod (advertised)

Premium Construction:

• Manufactured from proprietary Carrilloloy steel alloy containing chrome, nickel, molybdenum, and vanadium
• Vacuum arc remelt (VAR) process meets ASTM standards for exceptional material purity
• Precision CNC machined from oversized forgings for optimal grain flow
• 100% magnaflux inspected and Rockwell hardness tested
• Shot-peened finish for enhanced fatigue resistance
• Set balanced to +/- 1 gram for smooth operation

Carrillo Pro-H connecting rods are produced in small batches with obsessive attention to detail, making them the choice of professional racers worldwide. The CARR bolts represent a significant upgrade over standard ARP2000 bolts, providing superior clamping force and reliability under extreme loads. These rods are not compatible with factory OEM pistons and require aftermarket forged pistons designed for the 5.669-inch rod length. Made in the USA with assembly lube included.