What does the STDX size mean for these bearings?

The STDX designation means these main bearings are 0.040 inches undersize. This is important if your engine's crankshaft has been machined (ground) down to a smaller diameter to repair wear or to achieve a specific clearance.

What is the pmax black racing line?

The pmax black racing line from King Engine Bearings uses an advanced tri-metal material. This construction offers improved strength and load-carrying capabilities compared to standard bearings, making them suitable for performance-oriented engine builds.

Are these bearings suitable for a daily driver?

While these are racing-line bearings, they can be used in a daily driver if the engine is being rebuilt with performance in mind or if the original bearings were worn. For a standard rebuild, always ensure your crankshaft journals are prepared to the correct undersize and that oil clearances are within specification.

King Engine Bearings Alfa Romeo Ar01608/34 (Size STDX) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB511XPSTDX
UPC: 611500569630

King Engine Bearings Alfa Romeo Ar01608/34 (Size STDX) Main Bearing Set

Name: King Engine Bearings Alfa Romeo Ar01608/34 (Size STDX) Main Bearing Set
Brand: King Engine Bearings
Price: 199.78 USD
Availability: InStock

$199.78

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King Engine Bearings main bearing set for Alfa Romeo. STDX size, pmax black racing line.

Key Features

Fits a range of Alfa Romeo vehicles including Alfetta, Berlina, and Spider.
STDX size is 0.040 inch undersize for use with a ground crankshaft.
Features King's pmax black tri-metal material for improved load capacity.
Part of the pmax black racing line for enhanced performance applications.
Direct replacement main bearing set.

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Will this fit your vehicle?

Product Details

This is a King Engine Bearings main bearing set, specifically the MB511XPSTDX model. It's designed for a range of Alfa Romeo vehicles, including models like the Alfetta, Berlina, and Spider. These bearings are part of King's pmax black racing line, meaning they're built for higher performance applications.

The STDX size indicates these bearings are 0.040 inches undersize, which is important if you're rebuilding an engine and have had the crankshaft ground down to match. The pmax black tri-metal material is a step up from standard bearings, offering improved load capacity and durability, especially under demanding conditions. They are a well-built option for anyone rebuilding or refreshing an Alfa Romeo engine where enhanced bearing performance is a goal.

When installing these bearings, it's crucial to ensure the crankshaft journals are clean and within the specified tolerance for the STDX size. Always refer to the manufacturer's installation instructions for proper torque and oil clearance details.