basically No Warranty unless its a factory defect....
Directly from M-Factory:
TERMS: Due to the nature of For Race Use Only products, MFactory Competition Products will provide a limited warranty for all Close Ratio Gears to be free of defects in materials and workmanship upon receipt of product and initial installation only. Parts returned must be determined by MFactory Competition Products to be defective before any warranty credit or replacement is issued
MFactory Competition Products's obligation under warranty shall be limited to repairing or replacing, at its option, any part proven defective. The customer must prepay transportation charges
Final determination of the suitability of the products for the use contemplated by the buyer is the sole responsibility of the buyer. MFactory Competition Products shall not be liable for any special, direct, indirect, incidental, or consequential damages, that might be claimed as a result of the failure of any part, including claims for delay, loss of profits, or labor
MFactory Competition Products shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty
There are no other warranties expressed or implied extending beyond those set forth above