What is the main purpose of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while handling the significant forces generated during combustion and power delivery.

What does 'STD' size mean for these bearings?

STD stands for Standard size. This means the bearings are designed to fit a crankshaft that has not been machined or worn beyond its original factory specifications.

What is the advantage of King's overlay material?

King's unique overlay material is bonded to a steel backing, creating a well-built bearing that offers improved resistance to higher loads and temperatures compared to standard bearings.

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Specifications

Brand: King Engine Bearings
Part #: MB5442MC
UPC: 611500621369

King 07-09 Mazdaspeed 3 L3-VDT MZR DISI (t) Duratec High Performance Main Bearing Set - Size STD

Name: King 07-09 Mazdaspeed 3 L3-VDT MZR DISI (t) Duratec High Performance Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-07-09-mazdaspeed-3-l3-vdt-mzr-disi-t-duratec-high-perf-t14-371949
Price: 95.31 USD
Availability: InStock

$95.31

Only 8 left in stock

King 07-09 Mazdaspeed 3 High Performance Main Bearing Set - Size STD.

Key Features

Fits 2007-2009 Mazdaspeed 3 with L3-VDT MZR DISI (t) Duratec engine.
Standard (STD) size for use with factory-spec crankshafts.
Features King's unique overlay material bonded to a steel backing for improved durability.
Designed for high-performance engine applications.

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About this part

Product Details

If you're rebuilding the bottom end of your 2007-2009 Mazdaspeed 3 with the L3-VDT MZR DISI (t) Duratec engine, a solid set of main bearings is crucial. This set from King Engine Bearings is designed to handle the demands of a performance engine.

King uses a unique overlay material that's bonded to a steel backing, giving you a well-built bearing that can withstand higher loads and temperatures. The standard (STD) size means these are meant for a crankshaft that's still within factory specifications, without excessive wear. These bearings are a popular choice when you need reliable performance from your engine's rotating assembly.