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Rebuild your Mazda or Kia engine with confidence using the King MB5304AM Main Bearing Set (Standard Size). Designed for Mazda and Kia DOHC 16-valve, SOHC 16-valve, and SOHC 8-valve engines, these main bearings deliver the OEM-level fitment and durability enthusiasts and professional builders demand.
King Engine Bearings are known worldwide for their precision engineering, advanced metallurgy, and long-lasting reliability. This standard-size main bearing set is manufactured to exact factory tolerances, ensuring proper crankshaft support, consistent oil clearance, and smooth engine operation. Whether you’re maintaining a stock rebuild, freshening up a high-mileage engine, or preparing a Miata for weekend track duty, King bearings provide the strength and confidence your build requires.
Constructed from high-quality bearing alloys, the MB5304AM set balances strength, fatigue resistance, and conformability—protecting your crankshaft from wear while withstanding high loads and RPM. With their proven reliability, King bearings are trusted by both performance enthusiasts and professional engine builders worldwide.
Key Benefits:
Fits Kia/Mazda DOHC 16V, SOHC 16V, SOHC 8V engines
Standard size for direct OEM replacement applications
Manufactured to strict tolerances for consistent oil clearance
Strong, durable alloy construction for long-term performance
Trusted King Bearings quality for stock and performance builds
Upgrade your rebuild with the King MB5304AM Main Bearing Set—the perfect combination of OEM precision and King’s proven durability.
This Part Fits:
Year | Make | Model | Submodel |
---|---|---|---|
1999 | Mazda | Miata | 10th Anniversary |
1994-1997,1999-2005 | Mazda | Miata | Base |
2000-2005 | Mazda | Miata | LS |
1994-1997 | Mazda | Miata | M Edition |
2004-2005 | Mazda | Miata | Mazdaspeed |
2000-2003 | Mazda | Miata | SE |
2003 | Mazda | Miata | Shinsen |
1997 | Mazda | Miata | STO |
Garage 56 believes so strongly in the products we sell that every item comes with a full 365-day replacement gurantee - regardless of the manufacturer warranty timeline.
In-stock orders placed before 1pm EST ship same day. All qualifying orders of $56 or more ship free. Flat-rate and expedited shipping options are available at checkout.
Items marked as "Special Order" are available for shipment direct from the manufacturer - also known as "drop shipping". In most instances we are able to ship directly to you however, in limited circumstances we will need to order the item into our warehouse before we are able to dispatch to you. In all cases, your form of payment will not be finalized until we confirm availability of all Special Order items - place your order with confidence!
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