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Denso U-Groove Traditional Spark Plugs Stock Heat Range (inc. 04-15 STI, 06-14 WRX)

$5.30
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SKU:
K20HR-U11
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Price is for 1 spark plug.

Spark plugs are not all alike. With the world-famous DENSO U-Groove spark plug it's easy to see, thanks to its patented U-shaped ground electrode. The U-Groove forms a channel for the spark nucleus to form at the instant of ignition, limiting quenching to generate a more potent spark. The premium features don't stop there: DENSO's distinctive five-rib insulator in purified alumina prevents leakage and flashover, while dual internal copper-glass seals and a copper-core center electrode with nickel-alloy tip assure reliable spark delivery. To keep your engine running smoothly, its spark plugs must fire 25 times a second or more. If just one spark plug skips a beat you'll know it instantly, with rough running, poor acceleration, and reduced fuel economy. DENSO U-groove spark plugs combine dependable performance and superior value.

Confirmed Applications:

2004-2015 STI
2006-2014 WRX
2004-2008 Forester XT

2005-2009 Legacy GT

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