Carrillo SC70458-4 Forged Piston and Ring Kit 87.5mm Bore K20 K-Series

The Carrillo SC70458-4 is a high-performance forged aluminum piston and ring kit engineered specifically for Honda K-Series K20A/A2/A3 engines. This complete 4-cylinder set delivers the precision and durability demanded by performance enthusiasts and engine builders.

Key Specifications:

• Bore: 87.5mm (3.445 inches)
• Compression Ratio: 9.7:1 (K20A/A2/A3) or 11.0:1 (K24 with K20A/A2/A3 head)
• Compression Height: 1.181 inches
• Piston Style: Flat top with four valve reliefs
• Stroke: 86.0mm
• Rod Length: 139.99mm
• Wrist Pin Diameter: 0.866 inches
• Piston Head Volume: +3.30cc
• Advertised Weight: 338 grams per piston
• Material: Forged aluminum

Complete Kit Includes:

• Four forged pistons
• Four piston ring sets (1.0mm steel top ring, 1.2mm cast iron second ring)
• Four wrist pins
• Four wrist pin retainers

CP-Carrillo pistons are manufactured in Irvine, California using state-of-the-art 5-axis machining and sophisticated computer modeling. Each piston is designed to work with oversized valves and high-lift camshafts, making them ideal for naturally aspirated or forced induction applications. The forged aluminum construction provides exceptional strength and heat resistance for high-performance street and racing engines.