Wiseco K0240A100 Big Block Chevy 396/427/454/502 Forged Dome Piston Kit 4.350 Bore 32cc 1.645 CH

The Wiseco K0240A100 is a Professional Series forged dome piston kit engineered for Chevrolet Big Block 396, 427, 454, and 502 cubic inch engines. Built from 2618 high-strength aluminum alloy and manufactured in the USA, these pistons deliver the strength and precision demanded by high-performance and race engine builds.

Featuring a +32cc dome volume and a 1.645" compression height, this kit is sized for a 4.350" bore with a 4.000" stroke and 6.135" rod length. At a 0-deck position with a 0.040" head gasket, compression ratios range from 10.3:1 (121cc chamber) up to 13.2:1 (96cc chamber), making this kit well-suited for naturally aspirated high-compression builds.

Key Features:

• 2618 High-Strength Forged Aluminum Alloy — superior tensile strength for demanding performance applications
• ArmorGlide® Skirt Coating — reduces friction, resists seizure, and lowers operating noise
• Vertical Gas Ports — improves ring seal and combustion efficiency
• Anti-Detonation & Pressure Seal Grooves — enhances ring seating and detonation resistance
• .310" Top Ring Land with Int. .320" / Exh. +.120" valve pockets
• .150" Wall Pin & Double Spirolox® — wrist pin part #S460 (.990" x 2.930") included
• 1/16", 1/16", 3/16" Ring Grooves — ringset sold separately (J100F8-4350-5)

Specifications:

• Kit Part #: K0240A100
• Bore: 4.350"
• Compression Height: 1.645"
• Stroke: 4.000"
• Rod Length: 6.135"
• Dome Volume: +32cc
• 0 Deck At: 9.780"
• Standard Deck Height: 9.800"
• Compression Ratio @ 96cc chamber: 13.2:1
• Compression Ratio @ 102cc chamber: 12.4:1
• Compression Ratio @ 118cc chamber: 10.5:1
• Compression Ratio @ 121cc chamber: 10.3:1
• Wrist Pin: S460 — .990" diameter x 2.930" length
• Skirt Type: Slab Sided

Wiseco's Big Block Chevy piston kits are trusted by engine builders for their precise tolerances, durable construction, and proven performance across a wide range of BBC applications.