What does the 0.25 size mean for these bearings?

The 0.25 size indicates that these bearings are 0.25mm undersize. This means they are designed to be used with a crankshaft that has been machined down by 0.25mm, ensuring a precise fit and optimal oil clearance for a rebuilt engine.

What is the pmax black racing line construction?

The pmax black racing line refers to King Engine Bearings' advanced tri-metal material. It's designed for higher performance applications, offering improved durability and load-carrying capabilities compared to standard bearings.

Are these bearings suitable for a daily driver?

While these are performance bearings, they are built with durability in mind. They are an updated option over the MB5180AM race bearings and can be a solid choice for a performance-oriented rebuild, but always follow manufacturer recommendations for your specific application.

Specifications

Brand: King Engine Bearings
Part #: MB5180XP0.25
UPC: 611500559389

King Engine Bearings Renault F8Q/F7R/F8M (Size 0.25) Performance Main Bearing Set

Name: King Engine Bearings Renault F8Q/F7R/F8M (Size 0.25) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-renault-f8q-f7r-f8m-size-0-25-performa-t14-364829
Price: 105.40 USD
Availability: BackOrder

$105.40

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Fits 1984-1987 Renault Alliance. King Engine Bearings performance main bearing set, 0.25mm undersize. Built for demanding use.

Key Features

Fits 1984-1987 Renault Alliance.
This is a main bearing set for Renault R9 and R11 engines.
Features King's pmax black racing line tri-metal construction.
These bearings are 0.25mm undersize for use with a machined crankshaft.
An updated performance option compared to the MB5180AM race bearings.

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About this part

Product Details

This is a King Engine Bearings performance main bearing set, specifically the MB5180XP0.25 model. You get the main bearings needed for your Renault R9 or R11 engine build. These are the pmax black racing line bearings, which are an updated option over the MB5180AM race bearings.

These bearings are built with a tri-metal construction, designed for the rigors of performance applications. The pmax black material offers improved durability and performance characteristics compared to standard bearings. They are 0.25mm undersize, meaning they are intended for crankshafts that have been machined down by that amount to ensure a fresh, precise fit.

If you're rebuilding the engine in your 1984-1987 Renault Alliance or 1985-1986 Encore, and you're looking for a well-built bearing set for a performance application, these are a solid option.