CP-Carrillo BC1021-035 Bullet Series Forged Piston Kit Small Block Chevy 4.035 Bore

The CP-Carrillo BC1021-035 is a Bullet Series forged piston kit designed for Small Block Chevrolet engines running all 23° cylinder heads. Built for circle track and high-performance race applications, these pistons are proudly manufactured in the USA from 2618 aluminum forgings — a material known for its superior strength and heat resistance under demanding race conditions.

This kit features a flat top profile with -6.8cc valve reliefs on both the intake and exhaust sides, allowing proper valve clearance and reducing shrouding for improved airflow and combustion efficiency. The pistons include .310" deep intake pockets (both sides) and are supplied with a matching ring package and wrist pins.

Key Specifications:

• Bore: 4.035"
• Stroke: 3.480"
• Rod Length: 5.700"
• Compression Height: 1.560"
• Dome/Dish Volume: -6.8cc (Flat Top)
• Compression Ratio: 9.8:1 (with 64cc heads)
• Valve Reliefs: Two valve reliefs, left and right (.310" deep, both sides)
• Ring Package: 1.5mm steel gas nitride top ring, 1.5mm Napier second ring, 3.0mm oil ring
• Wrist Pin: .927" x 2.500" with .180" wall
• Head Compatibility: All Small Block Chevy 23° heads
• Forging Material: 2618 aluminum alloy
• Made in USA

The CP-Carrillo Bullet Series is a trusted choice among circle track racers seeking a forged piston that delivers durability and precision at a competitive price point. These pistons are designed for naturally aspirated race engine builds using standard 23° Small Block Chevy cylinder heads.