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The Mahle OE piston set for GM 4.2L engines (2006–2009) is supplied in a 0.25mm oversize configuration with mounted rings included. These OE-quality pistons feature compensated ring grooves and expansion-controlled designs to maintain proper ring loading and oil control, providing an installation-ready option that aligns with OE manufacturing standards for rebuilds within the specified model years.
Mahle OE GM 4.2L 06-09 0.25MM w/ Rings Piston With Rings Set (Set of 6)
