Wiseco K0448X1 Chevy LT1 Gen V Flat Top Forged Piston Kit 4.075 in. Bore -6.9cc

The Wiseco K0448X1 is a Professional Series forged piston kit engineered specifically for the GM Gen V LT1 platform. Featuring a 4.075 in. bore, 4.000 in. stroke, and a -6.9cc flat top crown with a 1.115 in. compression height, this kit is built to handle the demands of high-performance and race-level LT1 builds.

Wiseco's Professional Series pistons are manufactured in the USA from 2618 high-strength forged aluminum alloy, delivering the tensile strength and fatigue resistance required for boosted and naturally aspirated applications. The flat top crown profile is specially designed to work with the Gen V LT1's direct injection combustion chamber geometry, ensuring proper fuel atomization and combustion efficiency.

Key Features:

• Bore: 4.075 in.
• Stroke: 4.000 in.
• Compression Height: 1.115 in.
• Pin Diameter: 0.927 in.
• Rod Length: 6.125 in.
• Crown Volume: -6.9cc (flat top)
• Alloy: 2618 High-Strength Forged Aluminum
• Ring Sizes Included: 1.2mm, 1.2mm, 3.0mm GFX rings
• Pin Style: 0.180 in. wall pins with wire locks
• ArmorGlide® Skirt Coating for reduced friction, seizure resistance, and quieter operation
• Anti-detonation and pressure seal ring grooves
• Designed for use with stock connecting rod
• Sold as a complete kit of 8 pistons

The ArmorGlide® skirt coating minimizes friction and improves overall durability under heavy load, while the precision-machined ring grooves provide excellent ring seal and blow-by control. These pistons are built for serious engine builders looking to push the Gen V LT1 platform beyond stock limits in street, track, or forced induction applications.