Best Denso Performance Spark Plugs in 2026

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling

The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect

Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage

DENSO Unique Twin-Tip Structure

1.1mm platinum center electrode

360 Laser welding

DENSOs revolutionary Twin-Tip design is a combination of highly durable precious metals-Platinum and Titanium.

The center electrode is created using an extremely durable platinum alloy that allows for the reduction of the tip size to 1.1mm in diameter, while maintaining the life of the plug.

The Titanium-enhanced alloy on the ground electrode also increases durability, which is critical to minimize tip erosion and achieve the new Twin-Tip design

This 6 pack NGK Laser Iridium 6994 Spark Plug replaces Autolite XP5224, Honda 9807B-5617W, Honda 9807B5617WA0, DENSO Auto Parts 3377, DENSO Auto Parts 4504, DENSO Auto Parts 5615, DENSO Auto Parts

REDUCE EMISSIONS AND MISFIRES: This tried-and-true Spark Plug boosts performance, and enables better performance so that your engine runs at its best. The durable shell reliably protects the spark plug from damage, ensuring long-lasting sparking capabilities. The center and ground electrodes promote sharper spark focus for fewer misfires

IMPROVE IGNITION AND SPARK EFFICIENCY: This Spark Plug employs advanced center and ground electrodes to produce complete and efficient combustion and deliver an outstanding spark for faster, stronger, and more powerful combustion over the life of the spark plug. The damage-tolerant center and ground electrodes minimize spark gap growth and provide greater ignitability and spark efficiency

This 4 pack NGK Laser Iridium 94702 Spark Plug replaces DENSO Auto Parts 3490, DENSO Auto Parts FXE20HE11C, Nissan BY483-DF6H0, Mazda 1UXE-18-110, parts and is perfect for replacement or a

REDUCE EMISSIONS AND MISFIRES: This tried-and-true Spark Plug boosts performance, and enables better performance so that your engine runs at its best. The durable shell reliably protects the spark plug from damage, ensuring long-lasting sparking capabilities. The center and ground electrodes promote sharper spark focus for fewer misfires

IMPROVE IGNITION AND SPARK EFFICIENCY: This Spark Plug employs advanced center and ground electrodes to produce complete and efficient combustion and deliver an outstanding spark for faster, stronger, and more powerful combustion over the life of the spark plug. The damage-tolerant center and ground electrodes minimize spark gap growth and provide greater ignitability and spark efficiency

FREE SHIPPING to anywhere IN USA and territories For This Item

Iridium LONG LIFE

DENSO 3417

FREE SHIPPING to anywhere IN USA and territories For This Item

Iridium LONG LIFE

DENSO 3444

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Spark Plug #5304

Iridium Power

T16EPR-U15

Increases engine performance and throttle response

Efficient fuel consumption

specs: Spark Plug Wire, Diameter: 5 mm, Length: 20', Notes: Quality black hypolon-copper

Stens one-year warranty ensures reliability and performance for every part.

Stens branded parts are trusted by professional dealers tperform OEM quality repairs. The Stens name is featured on all Genuine Stens product packaging.

This 6 pack DENSO 3194 Spark Plug replaces DENSO Auto Parts K16TR11, Toyota 94859009, Toyota 94856823, Toyota 90919-01192, parts and is perfect for replacement or a performance upgrade.

REDUCE EMISSIONS AND MISFIRES: The patented DENSO Spark Plug enables complete fuel ignition in the combustion chamber. It virtually eliminates erratic starts caused by poor fuel mixtures and excessive soot buildup. The DENSO Spark Plug employs a unique ground electrode designed to generate a larger spark nucleus at the point of ignition. Greater spark energy means improved flame travel, producing more complete, consistent, and efficient combustion

GAIN GREATER FUEL EFFICIENCY: This DENSO Spark Plug fires leaner mixtures than conventional plugs and improves throttle response. Its ground electrode was developed to improve ignitability for increased efficiency in emission gas purification and fuel consumption. The DENSO Spark Plug is 100 percent pre-fired to ensure reliable operation and lasts twice as long as conventional plugs. The unique five-rib insulator reduces flashover and decreases voltage loss

PT16EPR-L13

Increases engine performance and throttle response

Efficient fuel consumption

Denso # 4033

Denso Traditional Nickel Spark Plug

U-Groove Ground Electrode

100 percent pre-fired to ensure reliable operation

Copper core center electrode for superior thermal conductivity

Unique five-rib insulator reduces flashover and decreases voltage loss

Plugs easy to replace: factory-pre-set electrode gap, no adjustment necessary, important instructions for installation, e.g. the correct tightening torque, can be found on the packaging, Bosch advises not to lubricate the thread

Start gardening season confident even after winter break: high reliability and excellent cold start behaviour

High wear resistance and robustness: special ceramic material with high dielectric and mechanical strength