Nissan S15 Transmission Synchro Set Shaft Fork WPC Treatment
View the full price list for WPC treatments and options. (PDF)
See how WPC treatment improves surface hardness.
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S15 transmission synchro set
Product Information
Part Number: WPC-N0131-6-2
Components: Includes Shaft and Shift Fork with specialized surface treatments.
Revolutionize Your Shift Feel: The Power of WPC Treatment®
WPC Treatment is a state-of-the-art surface refinement technology that drastically improves metal characteristics.
By bombarding the metal surface with ultra-fine spherical shots at speeds of 200m/s, we achieve three critical performance upgrades:
Enhanced Fatigue Strength: Instantaneous heating and cooling during impact micro-refines the crystal structure, making components more resilient.
Increased Surface Hardness: Repeated plastic deformation creates a work-hardened, toughened surface layer.
Advanced Lubrication: Micro-dimples on the surface act as oil reservoirs, preventing oil film breakdown even under rapid, high-load shifting.
Advanced Treatment Technologies
MoS2 Shot Treatment (Solid Lubricant) This process fuses a solid lubricant layer of Molybdenum Disulfide (MoS2) directly onto the metal surface without using binders (resins). For shift forks, this significantly reduces sliding resistance, ensuring lightning-fast and butter-smooth gear engagements.
Sirius Finish® (Precision Polishing) A specialized polishing method that achieves a mirror-like smoothness (thousands-grit level) on complex geometries without damaging the part's shape. It refines the WPC-strengthened surface for the ultimate low-friction performance.
Custom Composite Options for Peak Performance
Depending on your driving needs, we combine these technologies for the ultimate result:
(A) WPC + Sirius: Boosts strength while significantly improving surface smoothness.
(B) WPC + MoS2: Combines high strength with a massive reduction in sliding resistance.
(C) WPC + Sirius + MoS2: The Ultimate Setup. Delivers the lowest possible friction and highest durability for the most demanding drivers.
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.

