F6A SOHC Forged Piston Kit - Monster Sport

This is a Monster Sport oversize forged piston kit for the Suzuki F6A/K6A engine family, specifically for the F6A SOHC turbo (659.8cc). It is intended for overhauling or refreshing engines with worn cylinders, whether from tuning wear or high mileage on a stock engine, using pistons sized slightly larger than factory replacement. Monster Sport optimized profile, clearance, wall thickness/shape/rigidity, and weight balance using 3D CAD/CAE simulation and bench testing to improve piston behavior under combustion pressure, aiming for better gas sealing, reduced blow-by, and lower oil consumption. The material is a forged alloy chosen for high-temperature strength suited to sustained high-boost, high-rpm use such as circuit driving. Part number 131566-9230M. Piston diameter is 65.09mm (for a 65.14mm bore), pin height 26.6mm, crown volume 8.3cc, piston deck height (recess from cylinder block top) 0.1mm, design compression ratio 8.3 (as measured with a Monster Sport reinforced metal head gasket), pin diameter 18mm, and individual piston weight 159g. The kit includes 3 pistons, 3 piston ring sets, 3 piston pins, 6 circlips, and instructions. The seller notes this is sold via consignment, so the packaging/box may differ from genuine retail packaging even though the parts themselves are genuine.

Listed as unused (未使用) condition. Seller notes it is a consignment sale so outer packaging may not match standard retail boxing, though the parts are genuine.

Shipping: Shipping is listed as anonymous/tracked shipping (匿名配送) but no carrier or cost detail is given beyond that in the source text.