ACL Race BMW M5 S85B50 V10 conrod bearing set Standard (STD)

Key Features & Benefits – ACL Race BMW M5 S85B50 V10 conrod bearing set Standard (STD)

ACL Race BMW M5 S85B50 V10 conrod bearing set Standard (STD) is intended for BMW S85B50 V10 applications with a tri-metal bearing design. Functional compatibility: this is a conrod bearing set where fit is driven by journal size, housing size and measured oil clearance.

The design is intended for higher-RPM operating conditions and uses a reduced-thickness overlay approach to support fatigue properties. The set uses identical halves, which keeps pairing straightforward during assembly.

When is this useful?

In rebuilds and engine builds, Standard (STD) sizing fits when crank pin and rod housing measurements support the planned oil clearance range and you want consistent, measurable bearing geometry.

Technical specs

• Type: Conrod bearing set
• Application: BMW M5, S85B50 V10
• Variant: Standard (STD), H
• Part number: 10B1580H
• Construction: Tri-metal
• Tunnel: 56.000–56.013 mm
• Shaft: 51.975–51.991 mm
• Max wall: 1.998 mm
• Max length: 15.9 mm
• Half type: Identical halves

Selection & installation tips

• STD sizing check: Measure crank pin journals and confirm Standard (STD) is the correct size choice.
• Housing & tunnel: Check rod housing size and roundness, then compare it to the listed tunnel range.
• Oil clearance: Verify oil clearance during mock-up using the same measurement method across all rods.
• Half pairing: Even with identical halves, confirm proper seating and clean locating tang engagement.
• Clean assembly: Clean oil passages and mating faces, then use assembly lube before first start.

Before final assembly, verify Standard (STD) sizing, the tunnel and shaft dimensions, bearing seating and measured oil clearance, then compare them to the technical specs listed above.