King Engine Bearings MB5304XP0.25 Mazda B6/B6-T/ZM/B3/B5 Main Bearing Set, +0.25 mm

King Engine Bearings Mazda B6/B6-T/ZM/B3/B5 Main Bearing Set - Size +0.25mm

Restore dependable bottom-end performance with the King Engine Bearings MB5304XP0.25 main bearing set for select Mazda B6, B6-T, ZM, B3, and B5 engines. Manufactured for precision engine rebuilding, this oversized bearing set is designed for crankshafts machined to accept a +0.25 mm bearing size. The set supports accurate crankshaft-to-bearing clearance and helps provide the stable foundation required for reliable lubrication and smooth engine operation.

King Engine Bearings uses carefully controlled manufacturing processes to produce consistent bearing geometry and dependable material performance. The MB5304XP0.25 is intended for automotive engine rebuild applications where crankshaft journals have been properly inspected and machined. Always verify crankshaft dimensions, housing bore condition, oil-clearance requirements, and engine-specific bearing selection before installation.

Application coverage includes select 1991–1996 Ford Escort models and 2003 Kia Rio applications equipped with compatible engines. Fitment can vary by engine configuration, production date, and prior machining work, so confirm the original engine code and required bearing size before ordering. This product is supplied as a main bearing set and is intended for professional installation using the manufacturer’s recommended assembly procedures and torque specifications.

What's Included: One King Engine Bearings MB5304XP0.25 main bearing set. Crankshaft, fasteners, seals, and installation tools are not included unless specifically noted by the manufacturer.

Features:

• Application: Designed for select Mazda B6, B6-T, ZM, B3, and B5 engine applications.
• Oversize Fit: +0.25 mm bearing size supports crankshafts machined for the corresponding oversized main bearing specification.
• Precision Manufacturing: Engineered for consistent bearing geometry and accurate crankshaft fitment.
• Rebuild Performance: Helps promote stable oil clearance, dependable lubrication, and smooth bottom-end operation when correctly installed.

Fitments:
1986 Mazda 323 Base
1986 Mazda 323 DX
1986 Mazda 323 LX
1987 Mazda 323 Base
1987 Mazda 323 DX
1987 Mazda 323 LX
1988 Mazda 323 Base
1988 Mazda 323 DX
1988 Mazda 323 GT
1988 Mazda 323 GTX
1988 Mazda 323 LX
1988 Mazda 323 SE
1989 Mazda 323 Base
1989 Mazda 323 GTX
1989 Mazda 323 LX
1989 Mazda 323 SE
1990 Mazda 323 Base
1990 Mazda 323 SE
1990 Mazda Protege 4WD
1990 Mazda Protege LX
1990 Mazda Protege SE
1991 Ford Escort GT
1991 Mazda 323 Base
1991 Mazda 323 SE
1991 Mazda Protege 4WD
1991 Mazda Protege DX
1991 Mazda Protege LX
1991 Mercury Capri Base
1991 Mercury Capri XR2
1991 Mercury Tracer LTS
1992 Ford Escort GT
1992 Ford Escort LX-E
1992 Mazda 323 Base
1992 Mazda 323 SE
1992 Mazda Protege DX
1992 Mazda Protege LX
1992 Mercury Capri Base
1992 Mercury Capri XR2
1992 Mercury Tracer LTS
1993 Ford Escort GT
1993 Ford Escort LX-E
1993 Mazda 323 Base
1993 Mazda 323 SE
1993 Mazda Protege DX
1993 Mazda Protege LX
1993 Mercury Capri Base
1993 Mercury Capri XR2
1993 Mercury Tracer LTS
1994 Ford Escort GT
1994 Mazda 323 Base
1994 Mazda Miata Base
1994 Mazda Miata M Edition
1994 Mazda Protege Base
1994 Mazda Protege DX
1994 Mazda Protege LX
1994 Mercury Capri Base
1994 Mercury Capri XR2
1994 Mercury Tracer LTS
1995 Ford Escort GT
1995 Mazda Miata Base
1995 Mazda Miata M Edition
1995 Mazda Protege DX
1995 Mazda Protege ES
1995 Mazda Protege LX
1995 Mercury Tracer LTS
1996 Ford Escort GT
1996 Mazda Miata Base
1996 Mazda Miata M Edition
1996 Mazda Protege DX
1996 Mazda Protege ES
1996 Mazda Protege LX
1996 Mercury Tracer LTS
1997 Mazda Miata Base
1997 Mazda Miata M Edition
1997 Mazda Miata STO
1997 Mazda Protege DX
1997 Mazda Protege ES
1997 Mazda Protege LX
1998 Mazda Protege DX
1998 Mazda Protege ES
1998 Mazda Protege LX
1999 Mazda Miata 10th Anniversary
1999 Mazda Miata Base
1999 Mazda Protege ES
2000 Mazda Miata Base
2000 Mazda Miata LS
2000 Mazda Miata SE
2000 Mazda Protege ES
2001 Kia Rio Base
2001 Mazda Miata Base
2001 Mazda Miata LS
2001 Mazda Miata SE
2002 Kia Rio Base
2002 Kia Rio Cinco
2002 Mazda Miata Base
2002 Mazda Miata LS
2002 Mazda Miata SE
2003 Kia Rio Base
2003 Kia Rio Cinco
2003 Mazda Miata Base
2003 Mazda Miata LS
2003 Mazda Miata SE
2003 Mazda Miata Shinsen
2004 Kia Rio Base
2004 Kia Rio Cinco
2004 Mazda Miata Base
2004 Mazda Miata LS
2004 Mazda Miata Mazdaspeed
2005 Kia Rio Base
2005 Kia Rio Cinco
2005 Mazda Miata Base
2005 Mazda Miata LS
2005 Mazda Miata Mazdaspeed

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1