Honda Civic Vtec B18C4 Turbo Low Compression Forged Piston Kit

Honda Civic Vtec B18C4 Turbo Low Compression Forged Piston Kit

Unlock the boost potential of your B-Series engine with the Wossner Turbo Compression Forged Piston Kit, engineered specifically for the Honda Civic Vtec B18C4. Designed for high-performance forced induction builds, this kit drops the compression ratio to 9.0:1 (depending on bore size), providing the essential safety margin needed to run high boost levels on pump or race fuel. Whether you are building a 400bhp fast-road car or a dedicated drag racer, these pistons offer the structural integrity required to handle massive cylinder pressures without compromising on longevity.

Forged from premium 4032-T6 high-silicon aluminium alloy, these pistons benefit from lower thermal expansion, allowing for tighter clearances that eliminate the cold-start "slap" often found in lesser forged internals. To further enhance performance, Wossner applies a unique Moly-based skirt coating to reduce friction and a mirror-polished crown finish to eliminate hot spots and resist detonation. This comprehensive kit includes everything needed for a bottom-end refresh, including high-strength gudgeon pins and a high-performance chrome-faced ring set designed for superior oil control under boost.

Key Performance Features

• Turbo-Ready Compression: Lowered 9.0:1 CR (standard bore) allows for higher boost pressures and safer tuning.

• High-Strength 4032-T6 Alloy: Precision forged for extreme durability while maintaining low thermal expansion.

• Anti-Friction Moly Coating: Skirts are treated with a dry-film lubricant to reduce drag and protect cylinder walls.

• Mirror-Polished Crowns: Polished domes reflect heat and prevent carbon adhesion, significantly reducing detonation risk.

• Enhanced Ring Seal: Includes a premium ring set specifically engineered to maintain a perfect seal under forced induction.

• Internal Weight Reduction: CNC-machined to remove unnecessary mass, promoting faster revving and reduced bearing strain.

Technical Specifications

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 B18C4 engine to its absolute limit.