Nissan S15 Transmission Synchro Kit: WPC Treatment Series
View the full price list for WPC treatments and options. (PDF)
See how WPC treatment improves surface hardness.
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Experience the Ultimate Shift: The Science of WPC Treatment®
WPC Treatment is a revolutionary surface refinement technology that drastically improves metal characteristics.
By bombarding the metal surface with ultra-fine spherical shots at high speeds (200m/s), we achieve three critical performance upgrades:
Increased Fatigue Strength: Instantaneous heating and cooling during impact micro-refines the crystal structure, making synchros more resilient under hard driving.
Higher Surface Hardness: Repeated plastic deformation creates a work-hardened, toughened layer to resist wear.
Superior Lubrication: Micro-dimples on the surface act as oil reservoirs, preventing oil film breakdown and ensuring consistent synchronization.
Advanced Surface Technologies
MoS2 Shot Treatment (Solid Lubricant) This process fuses a solid lubricant layer of Molybdenum Disulfide (MoS2) directly onto the metal surface without binders. This maximizes the low-friction effect, delivering a "butter-smooth" shifting experience that traditional coatings can't match.
Sirius Finish® (Precision Polishing) A high-precision polishing process that achieves a mirror-like smoothness (thousands-grit level). It refines the WPC-strengthened surface to reduce drag to the absolute minimum while maintaining the underlying metal's integrity.
Composite Treatment Benefits
(A) WPC + Sirius: Boosts strength while significantly improving surface smoothness for cleaner engagement.
(B) WPC + MoS2: Combines high strength with a massive reduction in sliding resistance.
(C) WPC + Sirius + MoS2: The Pinnacle of Performance. Engineered for the most demanding racing conditions, providing the lowest possible friction and highest durability.
Note: WPC Treatment® and Sirius Finish® are patented technologies of
Fuji Manufacturing Co., Ltd.
We can customize the treatment process based on your specific racing conditions and requirements.
