Carrillo BC1021-040W Bullet Series SBC Forged Piston Set 4.040 Bore Wissotta Spec

The CP-Carrillo BC1021-040W is a Bullet Series forged aluminum piston set engineered for Small Block Chevy (SBC) 350 applications built to Wissotta racing specifications. Designed with the precision and performance standards CP-Carrillo is known for, this set delivers race-proven reliability at an accessible price point.

Manufactured in the USA from high-strength 2618 forged aluminum, these pistons feature a flat-top design with two valve reliefs and a -6.8cc head volume, making them well-suited for high-compression performance and circle track builds. The 4.040" bore, 1.560" compression height, and 0.927" wrist pin diameter are precisely machined to tight tolerances for consistent performance across all eight cylinders.

Key Specifications:

• Bore: 4.040 in. (102.616mm)
• Stroke: 3.480 in.
• Rod Length: 5.700 in.
• Compression Height (CH): 1.560 in.
• Piston Head Volume: -6.8cc
• Piston Style: Flat top with two valve reliefs
• Wrist Pin Diameter: 0.927 in.
• Piston Material: Forged aluminum
• Application: Wissotta Spec

Ring Pack Included:

• Top Ring: 1.5mm ductile iron, plasma-moly faced, file-fit
• Second Ring: 1.5mm cast iron, phosphate coated, file-fit
• Oil Ring: 3.0mm low-tension

CP-Carrillo Bullet Series pistons are made in the USA and backed by extensive R&D, computer-designed forgings, and rigorous quality control — delivering high-performance results without compromise.