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ChampionPart #: 686

Champion 686 Spark Plug
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Verify this part fits before purchasing — free returns if it doesn't
$20.00Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
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✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
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Champion 686 Spark Plug
| Brand | Champion |
| Part Number | 686 |
| Ground Electrode Tip Design | Fine wire j gap |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.025 |
| Pre-Gap Size | 0.65 |
| Ground Electrode Quantity | 1 |
| Manufacturer Heat Range | 57 |
| Seat Type | Flat |
| Reach | 0.75 |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
| Resistor Type | No |
| Hex Type | Hex |
| Center Electrode Diameter (Inch) | 0.052 |
| Classification | Champion racing plugs |
| Gap Style | Fine wire j gap |
| Ground Electrode Material | Nickel copper alloy |
| Hex Size | 0.625 |
| Hex Size | 15.880 |
| Plug Type | C57 |
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
26114062AG501AG501XB10ESB9EGC57CR56869F09CSN1N57N59GN84N84GQN1R5671A10S40XLS40XLRW31ESU
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.