DENSO is one of the world's leading manufacturers of spark plugs. Trusted by all the major auto manufacturers, we have a spark plug for just about every application and purpose: passenger cars and trucks, racing, marine, motorcycles and power sports, industrial and small engines. No matter what kind of spark plug you need, DENSO meets all the requirements and more.
The Original U-Groove
Even DENSO's "standard" spark plug is something special. The innovative design that helped to make DENSO spark plugs famous, the U-groove plug employs a unique, channeled ground electrode designed to generate a larger spark nucleus at the point of ignition. Greater spark energy than ordinary plugs means improved flame travel, producing more complete, consistent, and efficient combustion.
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Contemporary spark plugs may employ precious metals like platinum on the center electrode. The platinum Twin-Tip plug raises the bar, with DENSO's special platinum alloy on the center electrode and a titanium-enhanced alloy on the ground electrode. The standing ground electrode reduces spark quenching, producing more effective ignition, while the durable alloys extend spark plug life. The DENSO Platinum TT® spark plug is designed to provide top performance and total value.
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DENSO was the pioneer in introducing platinum spark plugs to the automotive aftermarket, but was hardly content to rest on that achievement. While conventional platinum plugs use platinum only the center electrode, the DENSO Double-Platinum plug features platinum on both the center and ground electrodes. The precious metal fights corrosion and erosion, ensuring superior spark performance and maximum spark plug life.
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Iridium Long Life
DENSO's Iridium Long Life spark plug is standard equipment with a number of automakers, including GM, Toyota, Honda, and Mitsubishi. DENSO's patented iridium alloy is more durable than even platinum, allowing the center electrode to be shrunk to only 0.7 mm in diameter. This produces a dramatic improvement in ignitability and spark plug life.
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DENSO Iridium Power® spark plugs represent a performance breakthrough. The laser-welded center electrode is only 0.4mm in diameter – the slimmest iridium electrode in the industry. The taper-cut side electrode complements the design, delivering reliable spark energy under the most grueling pressures and temperatures.
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Based on the same iridium technology and 0.4mm center electrode as the Iridium Power® series, Iridium Racing® plugs are further upgraded with a 100 percent platinum ground electrode insert, 20 percent tougher insulator material, and premium construction. Recessed and surface-gap configurations are available for specialized racing engine applications.
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- Decades of constant innovation and improvement in spark plug design
- Premium materials and construction used throughout
- Precious metal and patented electrode configurations
- Multiple product lines to match every purpose and pocketbook
- Thousands of styles and heat ranges ensure the right plug for virtually any application
- Availability and product support throughout the world
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