Wiseco 6631M87 Forged Flat-Top Piston for 2002-2008 Honda/Acura K-Series

Vehicle Fitment

• 2002-2006 Acura RSX (Type-S, K20/K24)
• 2004-2008 Acura TSX (Base, K24)
• 2003-2007 Honda Accord (DX/EX/LX/SE, K24)
• 2002-2006 Honda CR-V (LX/EX, K24)
• 2003-2011 Honda Element (DX/EX/LX/SC, K24)

Features

• Forged 2618 aluminum for high strength and durability
• ArmorGlide® skirt coating for reduced friction and seizure resistance
• Flat-top crown design
• Precision ring grooves with anti-detonation groove
• Forced-pin oiling for reliable lubrication
• High-RPM and heavy-duty race capability
• Includes a premium ring set
• Fully machined crown and ring seal enhancements

Specifications

• Bore Diameter: 87.00 mm 
• Compression Height: 1.181 in (≈ 30 mm) 
• Piston Volume: -3.50 cc (dish) 
• Wrist Pin Diameter: 0.8661 in (≈ 22 mm)
• Material: 2618 Forged Aluminum 
• Coating: ArmorGlide® skirt coating 
• Series: Wiseco Professional Series 
• Piston Quantity: 1 (sold individually) 

Included Components

• 1x forged piston
• 1x set of piston rings
• 1x wrist pin
• Retainers (Spirolox or similar, depending on batch)

Product Description

The Wiseco 6631M87 is a high-performance forged piston engineered specifically for the Honda/Acura K-series engines (K20 / K24). Built from 2618 alloy and featuring a flat-top crown, this piston is designed to deliver superior strength and reliability, making it ideal for race builds or high-RPM performance driving.

Its ArmorGlide® skirt coating helps reduce friction and prevent scuffing, while the precision-machined ring grooves and anti-detonation features ensure excellent sealing and combustion stability. The forced-pin oiling provides consistent lubrication, especially critical in high-stress environments.

This piston is well-suited for serious engine builders and racers who demand a durable and robust component. It fits a wide range of K-series applications, including the Acura RSX Type-S, TSX, and several Honda Accord, CR-V, and Element models. Installation requires proper honing and clearances, and it's recommended to pair it with high-quality bearings, rings, and balanced rotating assembly for optimal performance.