Honda Integra Type-R B18C5 & B18C6 Turbo Low Compression Forged Piston Kit Maximise the boost potential of your high-performance B-Series engine with the Wossner Turbo Low Compression Forged Piston Kit. Precision-engineered specifically for the Honda Integra Type-R (B18C5 and B18C6), this kit is the primary choice for tuners moving away from naturally aspirated setups toward high-horsepower forced induction. By dropping the compression ratio to a boost-friendly 9.0:1, these pistons allow for significantly higher turbocharger pressures and more aggressive ignition timing, providing the safety margin needed to prevent catastrophic detonation while delivering massive power gains. Each piston in this kit is forged from 4032-T6 high-silicon aluminium alloy, a material selected for its exceptional structural integrity and low thermal expansion. This high-specification alloy allows for tighter piston-to-bore clearances than standard forgings, resulting in a quieter engine during cold starts and a superior ring seal throughout the rev range. The kit features Moly-coated skirts to minimise parasitic drag and mirror-polished crowns to reflect heat and eliminate hot spots within the combustion chamber. Complete with high-strength gudgeon pins and a premium ring set, this Wossner kit is built to handle the extreme cylinder pressures of a professional turbo build. Key Performance Features Turbo-Optimised Compression: Reduced 9.0:1 CR (bore dependent) allows for safe, high-PSI boost levels on pump or race fuel. 4032-T6 Forged Alloy: Premium high-silicon material offers maximum durability with low-expansion properties for daily refinement. Moly-Coated Skirts: A specialised dry-film lubricant coating reduces friction and protects cylinder walls under high-load conditions. Mirror-Polished Crowns: Polished domes resist carbon adhesion and hotspots, significantly lowering the risk of engine knock. Lightweight Reciprocating Mass: CNC-machined to approximately 292g per piston to improve engine response and reduce bearing strain. Complete Bottom-End Kit: Includes 4x forged pistons, high-performance chrome-faced rings, 21mm heavy-duty gudgeon pins, and clips. Technical Specifications Feature Specification Engine Code Honda B18C5 / B18C6 (Integra Type-R) Bore Sizes Available 81.00mm (Std) to 85.00mm Compression Ratio 9.0:1 — 9.2:1 (Turbo Low Comp) Stroke 87.20mm Compression Height 30.00mm Dome Volume -6.5cc Gudgeon Pin Diameter 21mm (WP092-SP) Piston Weight Approx. 292g Connecting Rod Length 138mm 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 B18C5 or B18C6 engine to its absolute limit.
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