MAHLE 224-3885-0.50MM Engine Piston Set GM 4.2L 0.50mm Oversize

The MAHLE 224-3885-0.50MM is an OE-quality oversize engine piston set designed for GM 4.2L inline-six engines. MAHLE is one of the world's largest OE piston manufacturers, supplying pistons directly to major automakers and bringing that same engineering excellence to the aftermarket.

Key Features:

• Compensated ring grooves ensure proper ring loading and long-term oil control
• Expansion-controlled design allows tight fitting clearances, reducing engine noise, wear, and emissions
• GRAFAL® anti-friction skirt coating — graphite-impregnated resin that reduces drag, scuffing, and cylinder bore wear
• Pin offset design for further reduction of piston slap and engine noise
• Lightweight construction reduces reciprocating mass for smoother engine operation and improved throttle response
• 0.50mm oversize — ideal for engines requiring cylinder bore restoration beyond standard dimensions
• Piston diameter, installation clearance, and installation direction are marked on the crown for precision installation

MAHLE's eutectic aluminum alloy is performance-proven across millions of engines worldwide, including high-output diesel and gasoline applications. These pistons are precision-machined to tight tolerances and engineered to OE form, fit, and function — making them a trusted choice for engine rebuilders seeking a reliable, long-lasting repair solution.