Perfect Circle CB984P50MM Connecting Rod Bearing Undersize - 0.50mm

The Perfect Circle CB984P50MM is a high-quality connecting rod bearing designed for engine rebuilds requiring 0.50mm undersize bearings for reground crankshafts. This precision-engineered bearing is part of the renowned Clevite 77 P-Series family, now manufactured under the MAHLE umbrella alongside the legendary Clevite brand.

Key Features:

• Tri-Metal Construction: Features a hardened steel backing combined with a copper-lead alloy intermediate layer and an electroplated babbitt metal overlay for optimal strength and durability
• 0.50mm Undersize: Engineered specifically for crankshafts that have been reground 0.50mm undersize during engine rebuilding
• Performance-Grade Design: Ideal for demanding applications including heavy-duty use, motorsports, and street performance engines
• High Crush Factor: Designed with higher eccentricity to compensate for rod bore distortion in high-RPM applications
• Superior Surface Properties: Babbitt overlay provides excellent slipperiness and conformability for reduced friction and wear

Perfect Circle has been a trusted name in engine components since 1895 and was acquired by MAHLE in 2007. This bearing represents over a century of precision engineering expertise, making it suitable as a direct replacement or upgrade from standard bi-metal bearings. The tri-metal design offers increased load capacity and is the most versatile replacement option for most OE applications.