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Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
Piston Kit – BMW B58 STD (11258637807)
  1. Piston Kit – BMW B58 STD (11258637807)
  2. Piston Kit – BMW B58 STD (11258637807)
  3. Piston Kit – BMW B58 STD (11258637807)
  4. Piston Kit – BMW B58 STD (11258637807)
  5. Piston Kit – BMW B58 STD (11258637807)
  6. Piston Kit – BMW B58 STD (11258637807)
  7. Piston Kit – BMW B58 STD (11258637807)

Engine Piston Kit BMW 540i 640i 740i 840i X5 X6 X7 B58 3.0 Turbo (For: BMW) 11258637807

These Standard (STD) piston kits are specifically designed for the BMW B58 engine. Typically featuring an 82.0mm bore (or a slightly larger 82.5mm size for overbore applications), they are manufactured from ZL109 aluminum alloy and offer a compression ratio ranging from 10.2:1 to 11:1. Key technical specifications include a 22mm full-floating piston pin, accompanied by a set of piston rings engineered specifically for high-boost operating conditions (with specifications of 1.0–1.2mm / 1.2–1.5mm / 2.0–2.8mm).

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Description

B58 Standard Piston Specifications:
Bore: Standard specification is 82.00 mm; high-performance kits typically utilize a slightly oversized bore of 82.5 mm.
Material: The standard material is ZL109 aluminum alloy, ensuring durability under high-boost operating conditions.
Compression Ratio: Typically ranges from 10.2:1 to 11:1, depending on the manufacturer (e.g., Mahle, CP, JE).
Compression Height (CH): Generally falls between approximately 33.27 mm (1.310″) and 33.4 mm (1.315″).
Piston Pin Diameter: 22 mm.
Stroke: 94.6 mm. Piston Crown Type: Dish-top design, typically featuring four valve reliefs, suitable for forced induction (turbocharged) systems.
Coatings: Typically includes an anti-friction coating on the piston skirt (such as Grafal) as well as a phosphate coating.
Connecting Rod Length: 148.2 mm.

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