What does '.50MM oversized' mean for these pistons?

This means the pistons are manufactured to be 0.50 millimeters larger in diameter than the standard factory size. This is typically used when the engine's cylinder bores have been machined (honed or bored) to this specific larger size during an engine rebuild to restore proper cylinder wall condition and piston fit.

Does this piston set come with everything needed for installation?

Yes, this set includes eight pistons, eight sets of piston rings that are already mounted on the pistons, eight wrist pins, and the necessary clips. This provides a complete package for installing the pistons in your engine.

Are these pistons suitable for a performance build?

These are Mahle OE (Original Equipment) quality pistons, designed to meet the specifications of the factory original parts. They are ideal for restoring an engine to its original performance and reliability, rather than for significant performance modifications.

Mahle OE GM 4.8L 5.3L Piston Set 2243729WR050MM

Name: Mahle OE GM 4.8L / 5.3L 05-09 fits LMG LC9 LY5 & LMF .50MM Piston With Rings Set (Set of 8)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-gm-4-8l-5-3l-05-09-fits-lmg-lc9-ly5-lmf-50mm-piston-with-rings-t14-53037
Price: 631.94 USD
Availability: BackOrder

Mahle OE GM 4.8L / 5.3L 05-09 fits LMG LC9 LY5 & LMF .50MM Piston With Rings Set (Set of 8)

$631.94

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle OE GM 4.8L / 5.3L 05-09 fits LMG LC9 LY5 & LMF .50MM Piston With Rings Set (Set of 8). These pistons are .50MM oversized for engine rebuilding.

Key Features

Fits 2005-2009 Buick, Chevrolet, GMC, Hummer, Isuzu, and Saab vehicles with 4.8L or 5.3L engines.
Pistons are .50MM oversized for engine rebuilding applications.
Set includes 8 pistons, 8 sets of piston rings, 8 wrist pins, and clips for a complete installation.
Features compensated ring grooves for proper ring loading and oil control.
Expansion-controlled design maintains small fitting clearances to reduce noise and wear.
OE quality from Mahle, a major original equipment manufacturer.

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Will this fit your vehicle?

Product Details

These Mahle OE pistons are .50MM oversized, meaning they are designed to be used when an engine block has been bored out to match this specific measurement during a rebuild. This set includes eight pistons, each with its own set of rings, plus the necessary pins and clips, making them ready to install right out of the box. Mahle is a major OE supplier, so you're getting parts that meet the original specifications for your GM 4.8L or 5.3L engine.

The design includes compensated ring grooves, which help ensure the piston rings are properly loaded and maintain good oil control. They also feature expansion-controlled designs. This means the pistons are built to maintain very small, consistent clearances within the cylinder bore, even as the engine heats up. This attention to detail helps reduce engine noise, minimize wear, keep emissions in check, and further improve oil management over time. Having the rings pre-mounted saves you a critical step during the engine assembly process.

This piston set is a solid choice for rebuilding the engine in a wide range of GM vehicles from 2005 to 2009, including popular models like the Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Tahoe. Because these are OE-quality replacements, they are designed to fit right and perform as the original equipment did, helping you get your engine back to its intended specifications.