King Racing BMW M5 S85B50 main bearing set Standard (STD)

Key Features & Benefits – King Racing BMW M5 S85B50 main bearing set Standard (STD)

King Racing BMW M5 S85B50 main bearing set Standard (STD) for BMW M5 S85B50 5.0L 40V DOHC engines. Type: Main Bearing, supplied in Standard (STD) size.

With STD sizing, fitment depends on crank main journal and housing condition, plus measured oil clearance during mock-up. The STD dimensions listed below support a checkable build plan when pairing the bearings with the block and crank.

When is this useful?

For an S85B50 rebuild or assembly, a Standard (STD) main bearing set fits when the crank and housings are within STD range and the goal is consistent seating and controlled oil clearance.

Technical specs

• Brand: King Racing
• Type: Main Bearing
• Application: BMW M5, S85B50, 5.0L 40V DOHC
• Size: Standard (STD)
• Country of origin: Israel
• Housing: 62.705–65.034 mm
• Length: 21.70 mm
• Max thickness: 2.496 mm
• Variant ID: MB-637XP

Selection & installation tips

• STD size check: Measure crank main journals and housing bores to confirm Standard (STD) is correct.
• Oil clearance: Verify oil clearance during mock-up using a consistent measurement method.
• Housing condition: Inspect saddle condition and bearing crush, as housing issues affect seating and clearance.
• Clean assembly: Clean oil passages and mating faces, then use assembly lube to protect the bearing surface on first start.
• Mock-up rotation: After tightening, confirm free crank rotation and check for any tight spots.

Before final assembly, confirm STD sizing, housing dimensions, length, max thickness and measured oil clearance, then compare them to the technical specs listed above.