Product Description

Hastings 2M4860 Plasma Moly Ring Set | 6.0L LS Piston Rings LQ4 LQ9 4.000" Bore

Fits 1999-2006 GM 6.0L LQ4 LQ9 Engines | 1.5mm / 1.5mm / 3.0mm Ring Pack | Plasma-Moly Performance Rings

Restore compression and performance with the Hastings 2M4860 Premium Plasma Moly Ring Set, designed specifically for 1999-2006 GM 6.0L LQ4 and LQ9 engines. This premium factory replacement ring set features a plasma-moly faced steel top ring for superior durability, reduced friction, and improved cylinder sealing under demanding conditions. Built for stock 4.000" bore applications, this ring set is ideal for engine rebuilds, refreshes, or performance upgrades where reliability and longevity are critical. With a 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring configuration, it delivers proven sealing performance for both daily drivers and workhorse trucks.

NOTE: 2005-later LQ4/LQ9 engines you MUST verify if you have a 1.2mm or 1.5mm thick top ring. Engines with a 1.2mm top ring and 2.5mm oil ring require part #2M5170

Key Features & Benefits

Plasma-Moly Top Ring Technology: Premium plasma-moly faced steel top ring provides enhanced wear resistance, reduced friction, and superior sealing performance.
OEM Replacement Ring Pack: Designed as a direct replacement for factory piston rings in 6.0L LQ4 and LQ9 engines, ensuring proper fitment and reliability.
Standard Bore Compatibility: Fits stock 4.000" cylinder bores, making it ideal for standard rebuilds and engine refreshes.
Balanced Ring Configuration: 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring provide optimal compression sealing and oil control.
Built for Durability: Engineered for long service life in both daily driven and heavy-duty truck applications.