4032 Aluminum Forged Pistons - Ultimate B58 Engine Upgrade

Precision-forged 4032 aluminum alloy for superior strength and thermal stability, ideal for high-performance turbo applications.

CNC-machined to exact OEM specs with reinforced wrist pins and optimized ring lands for reduced friction and increased durability.

Direct fit for BMW B58 engines in F30/F31/F34 340i, F32/F33/F36 440i, and G11/G12 740i models – perfect for track builds or daily-driven turbo tuning.

Weight-optimized design balances rotational mass while supporting 600+ horsepower reliably.

Mirror-finished skirts with advanced coating reduce cylinder wear and prevent scuffing under extreme conditions.

Includes full set of pistons ready for drop-in installation with OE connecting rods.

Wholesale priced for bulk buyers – upgrade your entire shop inventory with confidence.