Carrillo BCR1220-005 Bullet Series Forged Piston SBC 415 4.130 Bore 8.0cc Dome

The CP-Carrillo BCR1220-005 is a Bullet Race Series forged piston engineered specifically for Small Block Chevy (SBC) 415 cubic inch racing applications. Designed to mate with the Brodix Spec cylinder head used in USMTS, USRA, UMP, and Wissotta racing series, this piston delivers the precision and durability demanded by serious circle track competitors.

Each piston is proudly manufactured in the USA from high-strength 2618 forged aluminum alloy, featuring a solid dome forging with two valve reliefs and a domed profile that delivers an 8.0cc dome volume. The forging is FEA-designed for optimal strength-to-weight balance, with an advertised piston weight of 445 grams.

Key Specifications:

• Bore: 4.130 in. (104.902mm)
• Stroke: 3.875 in.
• Rod Length: 6.000 in.
• Compression Height: 1.062 in.
• Dome Height: 0.275 in.
• Piston Head Volume: 8.0cc Dome
• Pin Diameter: 0.927 in.
• Wrist Pin: 0.927 x 2.500 in. with 0.180 wall
• Piston Ring Thickness: 1.2mm gas nitride steel top / 1.2mm Napier second / 3.0mm oil
• Wrist Pin Style: Press-fit or floating
• Piston Style: Dome with two valve reliefs
• Intake Pocket Depth: 0.335 in.
• Vertical gas ports included
• Advertised Weight: 445 grams
• Application: Normally Aspirated

Bullet Series Features:

• Pistons balanced to ±1 gram
• 2618 forged aluminum for superior strength and durability
• Dual forced pin oilers
• Contact reduction grooves
• Accumulator groove for improved ring sealing
• Forged side relief
• Chromoly wrist pins with wire locks
• FEA-designed forging geometry
• Tight manufacturing tolerances
• ISO 9000 certified production
• Same manufacturing process as CP Pistons custom race series

CP-Carrillo's Bullet Series pistons bring race-proven forged piston technology to stock car and circle track builders who demand shelf availability without sacrificing quality. Each set ships with a piston spec sheet and ring installation guide.