U-Groove Spark Plug: OE Performance, lasts 30K+ Miles, K20R-U11
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DetailU-Groove design provides better ignitability for increased engine efficiency.
Product Features:- Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
- Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
- Wide range of part numbers for thousands of applications, including classic and collector cars
- Lasts twice as long as most conventional plugs
- 100% pre-fired to assure reliable operation
- U-Groove Conventional
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