CP-Carrillo BC1030-040 Bullet Series Forged Piston Small Block Chevy 4.040 Bore 9.5:1

The CP-Carrillo BC1030-040 is part of the renowned Bullet Series of forged pistons, engineered specifically for 23° cylinder head configurations on Small Block Chevy 385 cubic inch builds. Designed for a 4.040-inch bore with a 9.5:1 compression ratio, this piston delivers the precision and strength demanded by serious performance engine builders.

CP-Carrillo's Bullet Series forged pistons are crafted from high-quality forged aluminum and feature a dish crown with dual valve reliefs, optimized for compatibility with today's 23° SBC cylinder heads. These pistons are a proven choice for builds ranging from high-output street engines to full race applications including nitrous, turbo, and supercharged setups.

Key Specifications:

• Bore: 4.040 in. (102.616 mm)
• Stroke: 3.750 in.
• Rod Length: 5.700 in.
• Compression Height: 1.425 in.
• Piston Head Volume: +16.20 cc (dish)
• Piston Style: Dish with two valve reliefs
• Piston Material: Forged aluminum
• Pin Diameter: 0.927 in.
• Wrist Pin Style: Press-fit or floating
• Top Ring: 1.5mm ductile iron, plasma-moly faced
• Second Ring: 1.5mm cast iron, phosphate coated
• Oil Ring: 3.0mm
• File Fit: Yes

Each CP-Carrillo piston is manufactured in the USA from premium materials, reflecting the company's decades-long commitment to quality, reliability, and performance in competition engine building. Whether you're building a street cruiser or an all-out race engine, the BC1030-040 delivers the dimensional accuracy and material integrity that professional builders demand.