Carrillo BCR1215-040 Bullet Race Series Forged Piston Set SBC Bore Pistons - 436 4.165

The CP-Carrillo BCR1215-040 is a Bullet Race Series forged piston set engineered specifically for Small Block Chevy 436 cubic inch race engines. Designed to mate precisely with the Brodix Spec cylinder head, these pistons are purpose-built for the demands of sanctioned circle track competition including USMTS, USRA, UMP, and Wissotta racing series.

Each piston is proudly manufactured in the USA from 2618 aluminum alloy forgings — the same high-strength material trusted by professional racing teams worldwide — delivering superior strength, durability, and heat resistance compared to conventional cast or hypereutectic pistons.

Key Specifications:

• Bore: 4.165 in. (+0.040 oversize)
• Stroke: 4.000 in.
• Rod Length: 6.000 in.
• Compression Height: 1.000 in.
• Dome Volume: +8.0cc solid dome
• Wrist Pin: 0.927 in. x 2.500 in. chromoly with wire locks
• Ring Groove Configuration: 1.2mm / 1.2mm / 3.0mm
• Intake Pocket Depth: 0.335 in.
• Head Chamber Volume Compatibility: 64.0cc

Bullet Race Series Features:

• Forged from 2618 aluminum for maximum strength and durability
• Pistons balanced to ±1 gram for precise weight matching
• Dual forced pin oilers for consistent lubrication
• Contact reduction grooves to minimize friction
• Accumulator groove for improved ring seal
• 1.2mm gas nitride steel top ring for enhanced wear resistance
• 1.2mm Napier second ring for superior oil control
• 3.0mm oil ring
• FEA-designed forging geometry
• Vertical gas ports for optimized ring support
• ISO 9000 certified manufacturing process

The BCR1215-040 set includes pistons, rings, and chromoly wrist pins with wire locks — everything needed for a complete, race-ready engine build. CP-Carrillo's rigorous quality control and USA manufacturing ensure each set meets tight tolerances straight out of the box.