Honda Civic Type-R & RSX Type-S K20 High Compression Forged Piston Kit Elevate your Honda K20 engine's performance with the industry-leading Wossner High Compression Forged Piston Kit. Specifically engineered for the Civic Type-R (EP3, FN2) and Acura RSX Type-S (DC5), these pistons are the definitive choice for naturally aspirated builds aiming for maximum volumetric efficiency. By increasing the compression ratio to 12.0:1, this kit significantly enhances throttle response and power delivery across the entire VTEC powerband, making it essential for competitive track use or high-performance fast-road applications. Each Wossner piston is precision-forged from 4032-T6 high-silicon aluminium alloy, a material renowned for its low thermal expansion properties. This allows for tighter piston-to-bore clearances, resulting in a quieter engine during cold starts and reduced oil consumption compared to traditional forgings. The kit comes complete with high-strength gudgeon pins, circlips, and a premium low-friction piston ring set, ensuring a superior seal under the extreme pressures of a high-revving K-series engine. Key Performance Features High Compression Power: Increases compression to 12.0:1 for improved thermal efficiency and peak horsepower gains. Precision Forging: Manufactured from 4032-T6 alloy for maximum structural integrity and high-RPM durability. Moly-Coated Skirts: Unique dry-film lubricant coating reduces friction, heat, and skirt wear for a longer engine life. Mirror-Polished Crowns: Features a polished dome finish to disrupt carbon buildup and resist harmful detonation. Reduced Piston Slap: Low-expansion material allows for tighter tolerances, ensuring quieter operation and better ring seal. Complete Engine Kit: Includes 4x forged pistons, high-performance rings, heavy-duty gudgeon pins, and circlips. Technical Specifications Feature Specification Engine Code Honda K20A, K20A2, K20Z4 Bore Sizes Available 86.00mm (STD) to 89.00mm Compression Ratio 12.0:1 (High Compression) Stroke 86.00mm Compression Height 30.00mm Gudgeon Pin Diameter 22mm Piston Material 4032-T6 High-Silicon Aluminium Connecting Rod Length 139mm (OEM Fitment) Valves per Cylinder 4 Why Choose Wossner? Wossner is globally recognised as the innovative specialist for high-performance forged pistons and connecting rods. With decades of experience at the highest levels of European motorsport, Wossner products are engineered to withstand the extreme duress of competition while maintaining the refinement required for everyday use. Every kit is manufactured in-house at their state-of-the-art German facility, utilizing advanced CNC machining to guarantee micro-level precision. When you choose Wossner, you are investing in German engineering excellence that delivers uncompromised longevity, superior power, and the reliability needed to push your K20 engine to its absolute limit.
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