Carrillo BLS1012-010P Bullet Series CPP Forged Piston LS 4.010 Bore

The CP-Carrillo BLS1012-010P Bullet Series piston is a high-performance forged piston engineered for GM LS platform engines. Built on CP-Carrillo's proven platform, the Bullet Series delivers race-proven technology at an accessible price point — without compromising on quality, strength, or precision.

Manufactured from 2618 forged aluminum alloy, these pistons are engineered to handle the demands of forced induction and power-adder applications including nitrous oxide, superchargers, and turbos. Each piston features a FEA (Finite Element Analysis) designed forging for optimized strength-to-weight ratios and tight manufacturing tolerances throughout.

Key Features:

• Forged from 2618 aluminum alloy for superior strength and thermal resilience
• Balanced to ±1 gram for smooth, high-RPM operation
• Dual forced pin oilers with annular reservoir for enhanced wristpin lubrication
• Contact reduction grooves and accumulator grooves for improved ring seal
• Forged side relief for reduced skirt friction and lower piston noise
• FEA-designed forging with tight manufacturing tolerances
• Compatible with power adder applications (nitrous, boost, supercharger, turbo)
• Includes chromoly wrist pin (.927" x 2.250", .180" wall) with wire locks
• Includes 1.5mm steel gas nitrided top ring, 1.5mm Napier taper hook second ring, and 3.0mm 3-piece soft nitrided oil ring
• Made in the USA

Specifications:

• Bore: 4.010"
• Stroke: 3.622"
• Rod Length: 6.125"
• Pin Diameter: .927"
• Ring Pack: 1.5mm / 1.5mm / 3.0mm
• Alloy: 2618 Forged Aluminum

The CP-Carrillo Bullet Series represents the ideal solution for LS performance builds that demand reliability under extreme conditions. Whether building a street/strip machine or a dedicated race engine, these pistons deliver the quality and durability CP-Carrillo is known for — at a price that makes high-performance builds more attainable.