Wossner Civic B16A1, A2 & A3 10:1 High Compression Forged Piston Kit The Wossner Civic B16A High Compression Forged Piston Kit is specifically developed for naturally aspirated (NA) tuning on the legendary 1.6L VTEC engine. By increasing the compression ratio to 10.0:1, these pistons enhance the thermal efficiency of the B16A1, A2, and A3 series, resulting in sharper throttle response and increased torque throughout the rev range. This kit is the perfect choice for engine builders seeking to maximise the performance of the B-Series without the added weight and complexity of forced induction. Precision-manufactured in Germany from high-grade 4032-T6 forged aluminium, these pistons are designed to thrive in high-RPM environments. The low thermal expansion properties of the 4032 alloy allow for tighter piston-to-bore clearances, which significantly reduces operational noise and "piston slap" during cold starts. Furthermore, the crowns are mirror-polished to improve flame travel and prevent carbon build-up, while the skirts feature Wossner’s advanced Moly coating to minimise friction and wear during high-speed VTEC engagement. Key Performance Features High-Compression 10.0:1 Profile: Specially engineered to increase power and efficiency in naturally aspirated Honda B-Series builds. 4032-T6 Forged Alloy: High-silicon material offers superior strength and durability with minimal thermal expansion for a quieter engine. Unique Moly Skirt Coating: Reduces internal drag and friction, protecting the cylinder bores and improving engine longevity. Mirror-Polished Crowns: Designed to resist detonation and ensure an even spread of heat across the piston surface. Race-Proven Reliability: Extensively tested in European motorsport to withstand the extreme stresses of high-revving competition engines. Technical Specifications Feature Specification Engine Code Honda B16A1 / B16A2 / B16A3 Bore Size Options 81.00mm (Std) / 85.00mm Compression Ratio 10.0:1 (High Compression) Compression Height 30.00mm Stroke 77.40mm Dome Volume +2.84cc Pin Diameter 21.00mm Rod Length (OEM) 134.40mm Kit Part Number K9534 (Series) Why Choose Wossner? Wossner is globally recognised as a pioneer in high-performance engine internals, with a heritage rooted in European motorsport and precision engineering. By owning and operating their own forging plant in Germany, Wossner maintains absolute control over the quality and consistency of their aluminium alloys. This vertical integration allows them to produce pistons that are lighter, stronger, and more thermally efficient than standard cast or mass-produced forged components. When you choose Wossner for your Honda B16A build, you are installing a product trusted by world-class engine builders to deliver podium-winning performance and daily-driver reliability.
