Wiseco K573M88 88mm Forged Piston Kit for 02-11 Honda Civic Si/Acura RSX K20/K24

Vehicle Fitment

• 2002-2005 Honda Civic Si (EP3, 2.0L K20A3)
• 2006-2011 Honda Civic Si (Sedan/Coupe, 2.0L K20Z3)
• 2002-2004 Acura RSX Type-S (DC5, 2.0L K20A2)
• 2005-2006 Acura RSX Type-S (DC5, 2.0L K20Z1)
• 2002-2006 Acura RSX Base (DC5, 2.0L K20A3)
• 2004-2008 Acura TSX (2.4L K24A2)
• 2002-2006 Honda CR-V (2.4L K24A1)
• Hybrid K24/K20 engine builds (K24 block with K20 head)

Fitment Notes

• Designed specifically for K24 block with K20A, K20A2, K20Z1, or K20Z3 cylinder head combinations
• 88mm bore represents a 1mm (0.040 inch) overbore from stock 87mm K24 specification
• Compatible with both naturally aspirated and forced induction applications
• Not compatible with K24Z or K24W series engines due to different deck height specifications
• Professional cylinder boring and honing required for proper installation

Features

• Engineered, forged, and machined in the USA from 2618 aluminum alloy for superior tensile strength and exceptional heat resistance under extreme conditions
• ArmorGlide skirt coating minimizes friction, reduces piston-to-cylinder wall wear, prevents seizure, and provides quieter engine operation while freeing up horsepower
• Professional Series construction designed for heavy to severe duty racing applications with no-expense-spared engineering and custom-level performance features
• Optimized for Frankenstein K24/K20 hybrid builds combining K24 displacement with K20 head flow characteristics for maximum performance potential
• Generous valve pocket designs accommodate oversized valves and high-lift camshafts without interference, enabling aggressive camshaft profiles
• Precision-machined ring grooves with proper orifice and accumulator volume featuring excellent surface finish for maximum ring seal and minimized blow-by
• Complex piston skirt profiles reduce power-robbing friction while promoting stability in the bore for optimal ring seal and high-RPM reliability
• Strutted skirt design provides additional piston strength and stability under extreme boost pressures and high-RPM operation for forced induction builds

Specifications

• Bore: 88.0mm (3.464 inches, 1mm overbore)
• Compression Ratio: 13.8:1 (with K24 block and K20 head combination)
• Compression Height: 30.0mm (1.181 inches)
• Dome Volume: +8cc (positive dome configuration)
• Wrist Pin Diameter: 22mm (0.866 inches)
• Stroke: 99mm (3.898 inches, K24 crankshaft)
• Rod Length: 153mm (6.024 inches, K24 connecting rod)
• Piston Material: 2618 forged aluminum alloy
• Ring Package: Plasma moly 1/16", 1/16", 3/16" pre-gapped rings
• Set of 4 pistons (complete inline-four engine set)

Included Components

• 4x Wiseco Professional Series forged pistons with ArmorGlide coating
• 4x Plasma moly piston ring sets (1.0mm, 1.2mm, 2.8mm pre-gapped rings)
• 4x Chromium alloy tool steel wrist pins (0.225 inch wall thickness)
• 8x Spirolox retaining clips

Product Description

The Wiseco K573M88 Professional Series forged piston kit represents the ultimate upgrade for Honda K-series engines, specifically engineered for the legendary K24/K20 hybrid "Frankenstein" builds that have become the gold standard for maximum naturally aspirated performance. Manufactured entirely in the USA using advanced forging processes and premium 2618 aluminum alloy, these pistons deliver exceptional strength-to-weight ratios and superior heat resistance compared to stock cast pistons. The 88mm bore size represents a precise 1mm (0.040-inch) overbore configuration that increases displacement while maintaining excellent reliability for both street and track applications. With a 13.8:1 compression ratio achieved through the +8cc domed piston design, this set is specifically optimized for high-performance naturally aspirated builds, enabling enthusiasts to extract maximum power from the K24's displacement combined with the superior flow characteristics of the K20 cylinder head.

Each piston features Wiseco's exclusive ArmorGlide skirt coating, a solid film lubricant technology that dramatically reduces friction during operation, minimizes piston-to-cylinder wall wear, and provides exceptional seizure resistance even under extreme high-RPM conditions. This coating also contributes to quieter engine operation while freeing up additional horsepower throughout the powerband. The included premium plasma moly ring package features pre-gapped 1.0mm, 1.2mm, and 2.8mm compression and oil control rings engineered to maintain optimal cylinder sealing, reduce blow-by, and ensure consistent compression across all four cylinders even during aggressive high-RPM operation. The generous valve pocket designs allow for oversized valves and high-lift camshafts without clearance concerns, while the strutted skirt design provides exceptional piston stability and strength under extreme loads, making this piston set ideal for both naturally aspirated and forced induction applications.

This complete four-piston set is precision-engineered specifically for K24/K20 hybrid builds combining the K24A block with K20A, K20A2, K20Z1, or K20Z3 cylinder heads, creating the ultimate displacement and flow combination. Each piston is machined to exact tolerances with a 30.0mm compression height and 22mm wrist pin diameter, ensuring proper fitment with K24 connecting rods and crankshafts. The complex skirt profiles reduce friction while maintaining piston stability at high RPM, and the dedicated forgings ensure superior strength compared to generic off-the-shelf alternatives. The heavy-duty chromium alloy tool steel wrist pins feature 0.225-inch wall thickness for maximum strength and durability. Whether building a naturally aspirated K24/K20 hybrid capable of 300+ horsepower, preparing for forced induction with turbocharging or supercharging, or constructing a dedicated competition engine, the Wiseco K573M88 piston set delivers the durability, precision, and power potential demanded by serious Honda K-series enthusiasts and professional engine builders worldwide.