Overview
UEM Piston GM LS2/LS3/LSA/LS9, 6.0L/6.2L 4.075/4 inch Stroke Dish -20 offering exceptional durability and performance for both street and track builds. Featuring a 4.075" bore and a 4.000" stroke, this piston includes a dished top ideal for turbocharged or supercharged applications where lower compression ratios are desired. It is crafted from high-strength forged 2618 aluminum, making it highly resistant to heat and stress in demanding environments. The piston is designed for use with 6.125" connecting rods and .927" floating wrist pins, with a compression height of 1.115" to suit a 9.240" deck height. Performance-enhancing features include CNC-machined valve reliefs for precise clearance, an anodized crown and top land for superior heat resistance, and accumulator grooves that improve ring seal and reduce flutter. Additionally, offset wrist pins reduce piston slap and noise, while the M42 skirt coating minimizes friction and wear. This piston is engineered for serious performance builds that demand strength, efficiency, and reliability under pressure.
Features
- Engine Compatibility: GM LS2, LS3, LSA, LS9 (6.0L / 6.2L)
- Bore Size: 4.075"
- Stroke: 4.000"
- Piston Style: Dished top (ideal for boosted or lower-compression builds)
- Material: Forged 2618 aluminum – strong, durable, and heat-resistant
- Rod Compatibility: 6.125" connecting rods
- Wrist Pin Diameter: .927", floating pin
- Compression Height: 1.115"
- Deck Height Compatibility: 9.240"
- Valve Angle: 15°