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DENSO IRT01-31 Iridium Racing Spark Plug

Marsoni M251S
Sale price$152.99
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DENSO IRT01-31 Iridium Racing Spark PlugThe DENSO IRT01 31 Iridium Racing Spark Plug is engineered for high performance, providing more power and torque. It features a 1. 1mm electrode gap and a solid bolt terminal type. The plug has a diameter of 14mm and a reach of 19mm, with a bolt head diameter of 20. 6mm. The 0. 4mm Iridium Rhodium alloy center electrode requires less voltage to fire, enhancing firing performance. The 0. 8mm pure platinum ground electrode minimizes the risk of melting
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  • We offer a 30-day return/exchange service after receiving.
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4.1 ★★★★★
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Michael Rhodes
Port Orchard, US
★★★★★ 5
Outboard thermostat
Works fine. A little pricey but better to buy the best than risk a cheap failure and destroy your engine like i did once.
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Reviewed in the United States on May 29, 2026
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carlos febus
Phoenix, US
★★★★★ 5
Good
Good
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Reviewed in the United States on April 27, 2026
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Will Rhoden
Bozeman, US
★★★★★ 5
Works as it should
Works as it should
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Reviewed in the United States on March 24, 2026
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kelly napper
New York, US
★★★★★ 4
Four Stars
Just what I needed
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Reviewed in the United States on October 14, 2016
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Paul Schneeman
Battle Creek, US
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
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Reviewed in the United States on November 20, 2024

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