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Description
HKS Super Fire Racing Spark Plug M-Series - IL Type Heat Range #9HKS Plugs ignites faster with a predictable strong spark to improve fuel efficiency and achieve the best performance in any conditions and environment. It's very important to provide reliable ignition for an engine to perform at a maximum power. HKS Super Fire Racing Plug is the best plug item for extreme racing conditions, that also will perfectly fit in the stock engine as well. HKS Super Fire Racing Spark Plug M Series IL Type Heat Range #9 Sold
HKS Plugs ignites faster with a predictable strong spark to improve fuel efficiency and achieve the best performance in any conditions and environment. It's very important to provide reliable ignition for an engine to perform at a maximum power. HKS Super Fire Racing Plug is the best plug item for extreme racing conditions, that also will perfectly fit in the stock engine as well.
HKS Super Fire Racing Spark Plug M-Series - IL Type Heat Range #9
Sold Individually
| Spark Plug Type | Thread Size | Wrench Size | Heat Range | Product | Code No. |
| LONG REACH Type | φ14×26.5mm | 16mm | NGK #9 | SUPER FIRE RACING M45iL | 50003-M45iL |
Features
- 0.6mm Iridium Alloy Center Electrode
Iridium alloy center electrode reduces voltage requirement and improves ignition performance and durability. - Outer Electrode with Platinum Chip
The outer electrode incorporates a square platinum chip which improves durability, and combining with the iridium center electrode boosts ignition performance.
The outer electrode features a shortened tip design and tapered shape while maintaining the necessary space for proper ignition. - Short Type Outer Electrode (Anti-Vibration)
The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves the longevity of the outer electrode. - Thermal Edge
After long idling or under various combustion conditions, carbon buildup can occur causing misfires. The thermal edge of the ceramic insulator discharges to help decrease carbon deposits. - Spark Support Gap
Discharge occurs in the spark support gap (space between the tip of the insulator and the base of the outer electrode) to help prevent carbon buildup.
Performance and Efficiency
- Increased Ignition Performance
Decreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure. - Improved Durability
New material and design improve durability which allows for use under hard combustion conditions like continuous high load during circuit driving or aggressive tuning.
* Improper combustion condition and wrong heat range selection may cause damage to the spark plug. - Decreased Carbon Deposits
Thermal edge and spark support gap help prevent carbon buildup for better ignition under various combustion conditions.
ABOUT SUPER FIRE RACING
【SUPER FIRE RACING M Series】
Ultimate spark plug "M".
Ignitionability, durability, anti-insulation are all reinforced. HKS has made the best plug for both tuning engines and stock engines.
Features
- 0.6mm Iridium Alloy Center Electrode
Iridium alloy center electrode reduces voltage requirement and improves ignition performance and durability. - Outer Electrode with Platinum Chip
The outer electrode incorporates a square platinum chip which improves durability, and combining with the iridium center electrode boosts ignition performance.
The outer electrode features a shortened tip design and tapered shape while maintaining the necessary space for proper ignition. - Short Type Outer Electrode (Anti-Vibration)
The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode. - Thermal Edge
After long idling or under various combustion conditions, carbon buildup can occur causing misfires. The thermal edge of the ceramic insulator discharges to help decrease carbon deposits. - Spark Support Gap
Discharge occurs in the spark support gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup.
Performance and Efficiency
- Increased Ignition Performance
Decreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure. - Improved Durability
New material and design improve durability which allows for use under hard combustion conditions like continuous high load during circuit driving or aggressive tuning.
* Improper combustion condition and wrong heat range selection may cause damage to the spark plug. - Decreased Carbon Deposits
Thermal edge and spark support gap help prevent carbon buildup for better ignition under various combustion conditions.
Special Design RE-type for Rotary Engines
Rotary engines reciprocating design have a different mechanism and combustion condition. RE-type spark plugs are specially designed to meet the different requirement for rotary engines. The straight shape platinum outer electrode enables reliable ignition performance.
Heat Range Conversion Chart
| HKS | 25 | 30 | 35 | 40 | 45 | 50 | 52.5 | 55 |
|---|---|---|---|---|---|---|---|---|
| DENSO社 | 16 | 20 | 22 | 24 | 27 | 31 | 32 | 34 |
| NGK社 | 5 | 6 | 7 | 8 | 9 | 10 | 10.5 | 11 |
* Above information is the reference for heat resistance.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Very sweet
Format: Board book
This is probably my favorite of all the Pookie books. It really emphasizes the love between a mother and her child. AlMost made me cry.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 12, 2025
★★★★★ 5
Perfect, Perfect, Perfect!
Format: Board book
Up until about 6 months ago our three year old expressed little to no interest in books at all. The first book that captivated him was a book about rockets and since then it's pretty much been multiple books about rockets and trains with just a few others thrown in here and there. Then we found the Pookie books. We first got the Goodnight Pookie book and my son loves it so much that he wants us to read it to him many, many times at bedtime - something he didn't even request with his favorite rocket books! We bought him this one along with several other Boynton books and they are all hits! I'm so glad to see him get into a book that isn't focused on a vehicle or superhero. The books are also so cute! They rhyme and are the perfect length for bedtime.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 28, 2020
★★★★★ 5
A Warm Fuzzy Feeling Book
Format: Board book
This board book has beautiful illustrations and verse. This book is engaging even for the very, very young.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 5
Buy it!
Format: Board book
This book is so cute! Love all Sandra Boynton books, but this is one of my all time favorites. Great for an Easter basket or a gift for a toddler!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2025
★★★★★ 5
So sweet
Format: Board book
We love Sandra Boynton books and this is probably her sweetest. My kids always snuggle in with this one and I love the sentiment!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
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