Seller notes

Arctic Cat 6639-521 - OEM Arctic Cat Part Number: 6639-521 The new C-TEC2 revolutionary clean-burning engine technology demanded an entirely new oil formulation. This new lubrication system effectively delivers oil where it is required as a result using significantly less oil compared to traditional 2-cycle engines. The new technology required a new, unique viscosity and blend of additives and base stocks that did not previously exist in any other oil. After several years of intense testing, num...

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