CP-Carrillo BLS1031-030 Bullet Series Forged Piston & Ring Kit 4.030" Bore Flat Top

The CP-Carrillo BLS1031-030 is a Bullet Series forged piston and ring kit designed for high-performance Chevrolet applications. Built for power-adder use, these pistons deliver the engineering quality CP-Carrillo is known for at a value-conscious price point — without sacrificing the tight tolerances and rigorous quality control the brand demands.

Each piston is forged from 2618 aluminum alloy for superior strength and heat resistance under forced induction, nitrous oxide, or naturally aspirated high-output conditions. The flat top design with a -2.7cc valve relief provides a strong compression ratio foundation for a wide range of builds.

Specifications:

• Bore: 4.030 in.
• Stroke: 3.900 in.
• Rod Length: 6.125 in.
• Compression Height (CH): 1.160 in.
• Piston Style: Flat Top (FT)
• Valve Relief: -2.7cc
• Piston Weight: 465g
• Wrist Pin: 0.927 x 2.250 in. Chromoly with wire locks
• Ring Package: 1.5mm Steel Top / 1.5mm Napier 2nd / 3.0mm Oil
• Power Adder Compatible: Yes

Key Features:

• Forged 2618 aluminum alloy construction for maximum strength and durability
• Dual forced pin oilers for improved lubrication under high RPM
• Contact reduction grooves to minimize piston-to-wall friction
• Accumulator groove for enhanced ring seal and performance
• Forged side relief for reduced weight and improved skirt stability
• Computer-designed forgings for consistent tolerances across the set
• Includes chromoly wrist pins and wire lock retainers
• Contemporary high-performance ring set included

The Bullet Series represents CP-Carrillo's commitment to making professional-grade forged pistons accessible for budget-minded builders. The BLS1031-030 kit ships complete with pistons, rings, and wrist pins — everything needed for a quality engine build.