Wiseco K0134A7 Big Block Chevy 496 Forged Piston Set -7cc Dish 4.320 Bore

Featuring a -7.0cc dish crown designed for 24-degree conventional head open-chamber configurations, these pistons deliver a target compression ratio of approximately 8.5:1 — ideal for boosted builds that require a lower static compression ratio for safe, reliable power.

Key Specifications:

• Bore: 4.320 in.
• Compression Height (CH): 1.520 in.
• Stroke: 4.250 in.
• Rod Length: 6.385 in.
• Dish Volume: -7.0cc
• Wrist Pin Diameter: 0.927 in.
• Head Design Compatibility: 24-degree conventional open-chamber heads
• Applications: Turbo, Supercharger, Marine, Reverse Dome builds

Why Wiseco Forged Pistons?

• Manufactured using advanced forging technology for superior strength and durability
• Designed to handle the elevated pressures and temperatures of boosted and marine applications
• Precision-machined for tight tolerances and consistent performance across all eight cylinders
• Trusted by professional engine builders for street, strip, and marine performance builds

The K0134A7 is part of Wiseco's Professional Series BBC piston lineup, purpose-built for high-performance Big Block Chevy engine builds where reliability under boost is non-negotiable. Rings are sold separately — verify ring pack compatibility with your machine shop prior to final assembly.