Overview 

The UEM piston for GM 6.2L engines with a 4.070" bore and standard 3.622" stroke is a flat-top piston crafted from cast 390 hypereutectic alloy, known for its durability and excellent thermal resistance. Designed for use with 6.098" connecting rods and .943" floating wrist pins, it delivers a compression ratio of approximately 10.7:1 when paired with 64.5cc cylinder heads. The piston features a 1.33" compression height and includes a standard ring pack configuration of 1.5mm, 1.5mm, and 2.5mm. With its coated side skirts, this piston reduces friction and wear, making it ideal for high-performance naturally aspirated builds.

Features

• Designed for GM 6.2L LS-based engines

• 4.070" bore size

• Standard 3.622" stroke

• Flat-top piston design

• Made from cast 390 hypereutectic alloy

• Compatible with 6.098" connecting rods

• .943" floating wrist pin

• Compression ratio: ~10.7:1 with 64.5cc heads

• Compression height: 1.33" (33.8 mm)

• Ring pack: 1.5mm / 1.5mm / 2.5mm

• Coated side skirts to reduce friction and wear

• Ideal for naturally aspirated performance builds