Piston Kit for BMW N52B25 6-Cylinder (11257561844)

Piston Set (Φ82mm) for BMW E60 E90 E92 323i 525i N52B25 2.5 OE：11257561844

BMW N52B25 piston kits typically feature an 82.0 mm bore, a 79.0 mm stroke, and a 20 mm piston pin diameter, designed to achieve a compression ratio of 10.7:1 or 11.0:1. These pistons are suitable for the 2.5L inline-six (I6) engine and are typically equipped with piston rings sized at 1.2/1.5/2.0 mm, specifically engineered for magnesium-aluminum alloy engine blocks.

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Description

Description

Bore: 82.00 mm (Standard Size)
Stroke: 79.0 mm
Compression Ratio: 11.0:1 or 10.7:1
Piston Pin Diameter: 20 mm
Piston Pin Length: 46 mm
Piston Ring Thickness: Top Ring: 1.2 mm, Second Ring: 1.5 mm, Oil Ring: 2.0 mm
Piston Ring End Gap: Top Ring: 0.180–0.330 mm, Second Ring: 0.300–0.500 mm
Piston Material: ZL109 Aluminum Alloy
Applicable Engine Models: N52B25 (E90, E60, Z4, E83, E84, E87)