Honda Integra GSR B17A1 High Compression Forged Piston Kit Take your B-Series build to the next level with the Wossner High Compression Forged Piston Kit, specifically engineered for the rare and high-revving Honda Integra GSR B17A1 engine. This kit is the ultimate upgrade for enthusiasts looking to extract maximum naturally aspirated power from the 1.7-litre VTEC powerplant. By increasing the compression ratio to 11.2:1, these pistons optimize the combustion cycle, significantly improving mid-range torque and top-end throttle response, making them ideal for competitive circuit racing or aggressive fast-road use. Each piston is manufactured from 4032-T6 high-silicon aluminium alloy, a premium material selected for its low thermal expansion and high strength-to-weight ratio. This allows for tighter piston-to-bore clearances, which minimises the "piston slap" often associated with forged internals and ensures a quieter, more efficient engine during cold starts. The kit features mirror-polished crowns to prevent carbon build up and reduce the risk of detonation, alongside Moly-coated skirts for reduced internal friction, ensuring your B17A1 remains reliable even under the most demanding racing conditions. Key Performance Features High Compression Power: Engineered for a 11.2:1 compression ratio to boost thermal efficiency and horsepower in N/A builds. 4032-T6 Forged Alloy: Utilises high-silicon aluminium for superior durability and reduced thermal expansion. Moly-Coated Skirts: A specialized dry-film lubricant coating reduces friction and heat, extending engine and cylinder wall life. Mirror-Polished Crowns: Polished domes resist hot spots and detonation, ensuring a more uniform flame front during combustion. Lightweight Design: Precision CNC-machined to reduce reciprocating mass, allowing for faster engine acceleration and higher rev limits. Comprehensive Kit: Includes 4x forged pistons, high-performance ring sets, heavy-duty 21mm gudgeon pins, and circlips. Technical Specifications Feature Specification Engine Code Honda B17A1 (Integra GSR) Bore Sizes Available 81.00mm (STD) to 85.00mm Compression Ratio 11.2:1 (High Compression) Stroke 81.40mm Compression Height 30.10mm Gudgeon Pin Diameter 21mm Piston Material 4032-T6 High-Silicon Aluminium Dome Volume +4.85cc 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, utilising 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 B17A1 engine to its absolute limit.
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