Wossner Integra GSR B17A1 9.0:1 Forged Piston Kit The Wossner Integra GSR B17A1 9.0:1 Forged Piston Kit is the ultimate foundation for high-boost Honda builds. Specifically engineered for the rare and high-revving B17A1 engine found in the second-generation Integra GSR, this kit provides a significant drop in compression from the factory ratio. By targeting a 9.0:1 static compression, these pistons create the ideal internal environment for forced induction, allowing tuners to push higher boost pressures through the turbocharger while maintaining a high safety margin against engine-damaging detonation. Forged from premium 4032-T6 aluminium alloy, these pistons offer the perfect balance of strength and thermal efficiency. Wossner’s precision manufacturing ensures a lightweight design that reduces reciprocating mass, allowing your B17A1 to maintain its famous high-RPM character even under heavy boost. Each piston features a unique Moly-based skirt coating to minimise friction and wear, alongside mirror-polished crowns that reflect heat and prevent carbon buildup, ensuring your high-performance build remains reliable both on the street and at the track. Key Performance Features Boost-Optimised 9.0:1 Compression: Engineered specifically for turbo and supercharged applications to maximise power delivery and safety. Forged 4032-T6 Aluminium: Provides exceptional structural integrity with lower thermal expansion for tighter, quieter clearances. Friction-Reducing Moly Coating: Advanced skirt treatment reduces internal drag and protects the cylinder walls during high-load operation. Anti-Detonation Mirror Polishing: Hand-finished crowns eliminate hot spots and improve combustion efficiency in high-pressure environments. German Engineering Excellence: Precision-machined to exacting tolerances, ensuring perfect balance and easy installation for professional engine builders. Technical Specifications Feature Specification Engine Code Honda B17A1 Vehicle Fitment 1992-1993 Honda/Acura Integra GSR Bore Sizes Available 81.00mm (Std) / 81.50mm / 82.00mm Compression Ratio 9.0:1 (Turbo / Low Compression) Compression Height 30.00mm Stroke 81.40mm Pin Diameter 21.00mm Dome Volume -6.3cc Alloy Material 4032-T6 Forged Aluminium Why Choose Wossner? Wossner stands at the forefront of automotive forging technology, with a reputation built on decades of success in the world’s most competitive racing series. Unlike many competitors who source their blanks elsewhere, Wossner operates its own forging facility in Germany, allowing for total quality control from the raw alloy to the finished, precision-machined product. This dedication to excellence ensures that every Honda B17A1 piston kit provides superior durability, reduced noise, and the high-performance reliability that elite tuners demand for world-class engine builds.
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