Overview

The UEM Piston GM 6.0L 4.005/STD Stroke Flat is a high-performance piston designed for GM 6.0L engines, offering a perfect balance of strength, efficiency, and reliability for both street and race applications. With a 4.005-inch bore, it provides a slightly oversized fit—ideal for engines that have been lightly overbored during rebuilding or blueprinting processes. The flat-top design promotes efficient combustion and allows for a higher or more precise compression ratio, depending on the cylinder head and gasket combination. Designed to work with the standard stroke crankshaft, this piston maintains OEM geometry while offering improved durability under high-stress conditions. Constructed from high-quality materials, it’s built to withstand the intense heat and pressure of high-performance environments, whether naturally aspirated or under forced induction. This piston is an excellent choice for enthusiasts and builders looking to extract more power and reliability from their GM 6.0L platform.

Features

• 4.005" Bore Size: Slightly oversized for engines that have been lightly overbored, ideal for rebuilds or performance upgrades.

• Flat-Top Design: Supports efficient combustion and allows for optimized or higher compression ratios.

• Standard Stroke Compatibility: Designed to work with the factory stroke crankshaft, maintaining OEM balance and geometry.

• High-Strength Construction: Built from durable materials to withstand high temperatures and pressures.

• Suitable for NA or Boosted Builds: Versatile piston choice for both naturally aspirated and forced induction applications.

• Improved Engine Efficiency: Flat-top surface enhances flame travel and combustion consistency.

• Engineered for GM 6.0L Platforms: Precision fitment for LS-based 6.0L engines used in street, strip, or performance builds.