Carrillo BM4040-030 Small Block Chrysler Forged Piston Set 4.030 Bore

The Carrillo BM4040-030 is a precision-engineered forged piston set designed specifically for Small Block Chrysler engines with 18-degree cylinder heads. These high-performance pistons feature an inverted dish design with a -17.8cc volume, optimized for boosted and high-compression naturally aspirated applications.

Engine Specifications:

• Bore diameter: 4.030 inches
• Stroke: 4.000 inches
• Connecting rod length: 6.123 inches
• Compression ratio: 9.5:1 (calculated with 68cc combustion chamber)
• Dish volume: -17.8cc inverted dish
• Cylinder head compatibility: All 18-degree Small Block Chrysler heads

Key Features:

• Forged construction for maximum strength and durability under extreme cylinder pressures
• Inverted dish design optimizes flame propagation and combustion efficiency
• Precision-machined to exacting tolerances for perfect bore fit
• Engineered to work with popular Small Block Chrysler stroker combinations
• Compatible with modern 18-degree aftermarket cylinder heads

Carrillo pistons are manufactured to professional racing standards, making them ideal for high-performance street engines, drag racing applications, and forced induction builds. The inverted dish configuration allows for excellent quench characteristics while maintaining the target compression ratio with modern aluminum cylinder heads.