HKS Super Fire Racing MR-Series Spark Plugs
Achieve ultimate performance and reliability with HKS Super Fire Racing MR-Series Spark Plugs, engineered for high-powered, turbocharged, and high-compression engines. Featuring a unique design that combines an ultra-thin iridium center electrode with a specialized platinum ground electrode, the MR-Series spark plugs deliver exceptional ignition performance and precise combustion control, even under extreme conditions.
Designed to support optimal throttle response, increased horsepower, and better fuel efficiency, the MR-Series plugs offer a high heat resistance that enhances durability and longevity. They are optimized for motorsport and high-performance applications, providing a more stable ignition and minimizing the risk of misfire at high RPMs. Whether you're on the track or pushing your engine to the limit on the street, the HKS Super Fire Racing MR-Series Spark Plugs provide consistent power and smooth, responsive performance, so you can experience the thrill of maximum output without compromise.
| Product | Thread Size | Wrench Size | Heat Range | Code No. |
|---|---|---|---|---|
| SUPER FIRE RACING MR40XLB | D12 L=26.5mm | Bi-HEX 14 | NGK #8 | 50003-MR40XLB |
| SUPER FIRE RACING MR45XLB | D12 L=26.5mm | Bi-HEX 14 | NGK #9 | 50003-MR45XLB |
| SUPER FIRE RACING MR45HLZ | Protrusion type, Thread: φ12 L=26.5mm | 14mm | NGK #9 | 50003-MR45HLZ |
| SUPER FIRE RACING MR40XLZ | Protrusion type, Thread: φ12 L=26.5mm | 16mm | NGK #8 | 50003-MR40XLZ |
| SUPER FIRE RACING MR45XLZ | Protrusion type, Thread: φ12 L=26.5mm | 16mm | NGK #9 | 50003-MR45XLZ |
What clients say
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Really fast and high quality customer support, my order got to me faster than the quoted time too. No complaints
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The team took a mostly broken car after some work done elsewhere, and have systematically made it reliable and fast for a fair price. The staff are invested in the work they do which also makes a big difference.
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Jeff was extremely helpful in assisting me with my exhaust. Always kept me updated and answered any queries in a timely manner. Will definitely be coming back for my future mods
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Justin and his crew is amazing! Always ready to help and service with a smile. Trusty, friendly and reliable! Had my car sent in for repair twice and it’s fixed on time, at a reasonable price and with no issues. Highly recommended!
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Easy to deal with and part was ordered quickly
