GM 2.0L Dome Piston Set 86.00mm Bore

The Wiseco GM 2.0L Dome Piston Set with 86.00mm bore (K635M86) is a high-performance forged piston kit engineered for General Motors 2.0-liter DOHC engines, particularly suited to Opel and Vauxhall platforms. This complete piston and ring set delivers the structural integrity and thermal management required for modified and street-driven applications where stock pistons reach their limits.

The forged construction provides superior strength compared to cast alternatives, critical for handling elevated boost pressure, aggressive ignition timing, and sustained high RPM operation. The dome design optimizes combustion chamber geometry and compression ratio characteristics. Ring grooves are precisely machined to 1.0 x 1.2 x 2.8mm specifications, ensuring proper ring seating and blow-by control across a wide operating range. The flat-top piston profile allows tuners to dial in exact compression ratios for their specific fuel grade and forced-induction setup. Wiseco's manufacturing process emphasizes tight tolerances and consistent weight distribution across all pistons in the kit, minimizing vibration and extending bearing life.

This piston set is the choice for enthusiasts rebuilding turbocharged or naturally aspirated 2.0L GM engines seeking reliability beyond factory specifications. Whether preparing an engine for consistent track duty, high-boost street builds, or long-term high-RPM reliability, the Wiseco K635M86 delivers the core strength needed. The 86.00mm bore matches OEM specifications, simplifying block compatibility and reducing machine work. Complete kit format with matched rings streamlines assembly and ensures all components work as an integrated system.