| Feature | OEM SDF Parts | Aftermarket/Generic | | :--- | :--- | :--- | | | SDF dealer network | Third-party suppliers (e.g., Vapormatic, Sparex, A&I) | | Quality | Guaranteed to factory spec | Varies (Premium to Economy) | | Price | 100% (Highest) | 40–70% of OEM | | Warranty | Full SDF warranty | Vendor dependent | | Best For | Engines, ECU, Fuel Systems | Filters, Belts, Bearings, Seals |

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