What is the compression ratio impact of the -13.5cc dish?

The -13.5cc dish is designed to lower the compression ratio compared to a flat-top piston. The exact impact depends on your engine's bore, stroke, head gasket thickness, and combustion chamber volume. It's a key component for tuning the compression for your specific build.

Are these pistons sold individually or as a set?

This product listing is for a single piston. If you are rebuilding your engine, you will need to purchase the correct quantity of pistons for all cylinders.

Can this piston be shipped to California?

No, this piston is not CARB approved and cannot be shipped to California due to emissions regulations.

Wiseco Forged Piston -13.5cc 84mm Bore WD-02548

Name: Wiseco BMW M50 B25 -13.5cc 84mm Bore - SINGLE Piston
Brand: Wiseco
SKU: wiseco-wiseco-bmw-m50-b25-13-5cc-84mm-bore-single-piston-t14-862887
Price: 219.40 USD
Availability: BackOrder

Wiseco BMW M50 B25 -13.5cc 84mm Bore - SINGLE Piston

$219.40

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wiseco forged piston for BMW M50 B25 engines. Features -13.5cc dish and 84mm bore.

Key Features

Fits BMW M50 B25 engines.
Features a -13.5cc dish for specific compression ratios.
Has an 84mm bore size.
Constructed from forged aluminum for improved strength and durability.
Made by Wiseco, a well-known manufacturer of engine components.

This piston is designed for BMW M50 B25 engines. Please verify compatibility with your specific vehicle's engine configuration.

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Product Details

This is a single forged piston from Wiseco, specifically made for BMW M50 B25 engines. It features a -13.5cc dish and an 84mm bore, which is a common size for rebuilding or upgrading these engines. Wiseco is known for making strong internal engine components, and these pistons are built to handle the demands of performance applications.

Forged pistons like these are a solid choice when you're rebuilding the top end of your engine. They are made from a solid block of aluminum that's heated and hammered into shape, making them much stronger and more durable than cast pistons. This strength is important for maintaining compression and preventing piston failure under higher cylinder pressures. The 84mm bore is a standard size for many M50 B25 builds, and the -13.5cc dish helps achieve a specific compression ratio when paired with the right cylinder head and gasket combination.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. If you're working on a BMW M50 B25 engine and need a reliable, well-built piston for your rebuild, this Wiseco unit is a popular option.