Product Description
BMW B58 Connecting Rod Set - ItalianRP IRPR501
The ItalianRP connecting rods are built for serious power and reliability in BMW’s B58 3.0L inline-six engine, found in models like the 340i, M240i, X3 M40i, Z4 M40i, and the Toyota Supra MK5. Made from tough 34CrNiMo6 steel, these rods are engineered to handle high boost, aggressive driving, and track abuse without flinching. Each rod measures 148.2 mm center-to-center and is designed to work with a 22 mm wrist pin, making it a direct fit for stock internals. ItalianRP offers them in Silver, Gold, and Platinum tiers, with bolt options ranging from VIMI2500 to L19 and Custom Age, so you can match the right level of strength to your build. Whether you're pushing for big power or just want extra peace of mind, these rods are a smart investment for any B58 performance build. This connecting rod is paired with this ItalianRP piston which can be found here.
| Features | Specifications |
|---|---|
| Rod Code | IRPR501 |
| Piston Code | IRPP033DA |
| Engine Code | B58 |
| Number of Cylinders | 6 |
| Big End Diameter | 53.600mm |
| Big End Width | 23.900mm |
| Pin Diameter | 22.000mm |
| Between Centers | 148.20mm |
| Compatible Vehicles | M240i, M240i xDrive, 340i, 340i xDrive, M340i, M340i xDrive, 440i, 440i xDrive, 540i, 540i xDrive, 640i, 640i xDrive, 740i, 740i xDrive, 840i, 840i xDrive, X3 M40i, X4 M40i, X5 xDrive40i, X6 xDrive40i, X7 xDrive40i, Z4 sDrive40i, MK5 Supra |
| Manufacturing Origin | Italy |
ItalianRP is a performance engine component manufacturer based in Italy, specializing in high-quality forged pistons and connecting rods for European and Japanese engines. Known for their motorsport heritage and precision craftsmanship, ItalianRP parts are designed and built in-house using top-grade materials like 2618 aluminum and 4340 steel. Every component undergoes rigorous quality control and is CNC-machined to exacting tolerances, ensuring reliable performance in everything from street builds to full race applications. With a growing presence in North America through ItalianRP USA, the brand brings together Italian engineering excellence and a passion for pushing automotive limits.
