HKS Spark Plugs | Super Fire Racing M-Series

If you’re tuned, boosted, or pushing your car hard on the street or track, spark plugs stop being “maintenance” and start being a reliability part. HKS Super Fire Racing plugs are designed to maintain strong ignition under harsh conditions like high boost pressure, lean mixtures, and sustained high load.
Why HKS plugs work on modified engines
- 0.6mm iridium alloy center electrode helps reduce required voltage and supports stable ignition.
- Platinum chip ground electrode is built for durability while maintaining consistent spark performance.
- Thermal Edge + Spark Support Gap help reduce carbon buildup that can lead to misfires after idling or under varied combustion conditions.
- Anti-vibration outer electrode design (short-type) improves longevity in high-vibration environments.
Pick the right heat range
Heat range matters. Too hot, and you risk knock and plug damage. Too cold, and you can foul plugs and misfire. If you’re not sure what to run, follow your tuner’s guidance (fuel type, boost, timing, and plug gap all matter).
HKS ↔ NGK / Denso heat range reference
Reference only (heat resistance comparison):
- HKS 25 / Denso 16 / NGK 5
- HKS 30 / Denso 20 / NGK 6
- HKS 35 / Denso 22 / NGK 7
- HKS 40 / Denso 24 / NGK 8
- HKS 45 / Denso 27 / NGK 9
- HKS 50 / Denso 31 / NGK 10
- HKS 52.5 / Denso 32 / NGK 10.5
- HKS 55 / Denso 34 / NGK 11
Need install + verification?
We can install your HKS spark plugs locally in Orange County and verify results with datalogging / dyno services. If you’re chasing misfires, rough idle, or blowout under boost, plugs are often step one—but the right heat range and gap are what actually fix it.
Shop HKS Spark Plugs at EDO
Grab the correct heat range for your setup and get back to clean pulls—no hesitation, no breakup, no drama.
✅ Shop the HKS Super Fire Racing spark plugs
FAQs
Q: Are HKS Super Fire Racing plugs good for stock cars too?
A: Yes—HKS positions them for both stock and tuned engines, but they really shine when cylinder pressures and load go up.
Q: What causes misfire/blowout under boost?
A: Often it’s plug gap/heat range mismatch, weak ignition components, or carbon buildup—boost makes small issues loud fast.
Q: Do these plugs help with carbon-fouling and idle misfires?
A: The Thermal Edge and Spark Support Gap are designed to reduce carbon deposits that can lead to misfires after idling or varied combustion conditions.
Q: Can the wrong heat range damage a plug?
A: Yes—HKS specifically warns that improper combustion conditions and wrong heat range selection can damage the spark plug.
Q: What’s the difference between M-Series and MR-Series?
A: MR-Series is positioned around extended longevity/reliability (ruthenium alloy electrode) in certain applications—check listings for fitment.
Q: Do you offer installation?
A: Yes—if you want it done right the first time, install + verification is available locally.
Filters
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HKS SUPER FIRE RACING COIL PRO BCNR33
HKSOriginal price $ 1,630.00 - Original price $ 1,630.00Original price$ 1,630.00$ 1,630.00 - $ 1,630.00Current price $ 1,630.00| /Low stockHKS SUPER FIRE RACING COIL PRO BCNR33
Original price $ 1,630.00 - Original price $ 1,630.00Original price$ 1,630.00$ 1,630.00 - $ 1,630.00Current price $ 1,630.00| / -
HKS Hi-Power Muffler CIVIC TYPE-R FL5 K20C
HKSOriginal price $ 2,380.00 - Original price $ 2,380.00Original price$ 2,380.00$ 2,380.00 - $ 2,380.00Current price $ 2,380.00| /Out of stockHKS Hi-Power Muffler CIVIC TYPE-R FL5 K20C
Original price $ 2,380.00 - Original price $ 2,380.00Original price$ 2,380.00$ 2,380.00 - $ 2,380.00Current price $ 2,380.00| /Sold out -
HKS BCD PISTON + CONROD KIT G16E HC-TT S3
HKSOriginal price $ 3,880.00 - Original price $ 3,880.00Original price$ 3,880.00$ 3,880.00 - $ 3,880.00Current price $ 3,880.00| /In stockHKS BCD PISTON + CONROD KIT G16E HC-TT S3
Original price $ 3,880.00 - Original price $ 3,880.00Original price$ 3,880.00$ 3,880.00 - $ 3,880.00Current price $ 3,880.00| / -
HKS S Type O/C KIT BCNR33 BLK
HKSOriginal price $ 1,220.00 - Original price $ 1,220.00Original price$ 1,220.00$ 1,220.00 - $ 1,220.00Current price $ 1,220.00| /In stockHKS S Type O/C KIT BCNR33 BLK
Original price $ 1,220.00 - Original price $ 1,220.00Original price$ 1,220.00$ 1,220.00 - $ 1,220.00Current price $ 1,220.00| / -
HKS Forged Piston Kit RB26DETT 2.8L STEP ZERO - 87mm Bore
HKSOriginal price $ 4,250.00 - Original price $ 4,250.00Original price$ 4,250.00$ 4,250.00 - $ 4,250.00Current price $ 4,250.00| /In stockHKS Forged Piston Kit RB26DETT 2.8L STEP ZERO - 87mm Bore
Original price $ 4,250.00 - Original price $ 4,250.00Original price$ 4,250.00$ 4,250.00 - $ 4,250.00Current price $ 4,250.00| / -
HKS Forged Piston Kit RB26DETT 2.8L STEP ZERO - 86.5mm Bore
HKSOriginal price $ 4,250.00 - Original price $ 4,250.00Original price$ 4,250.00$ 4,250.00 - $ 4,250.00Current price $ 4,250.00| /Low stockHKS Forged Piston Kit RB26DETT 2.8L STEP ZERO - 86.5mm Bore
Original price $ 4,250.00 - Original price $ 4,250.00Original price$ 4,250.00$ 4,250.00 - $ 4,250.00Current price $ 4,250.00| / -
HKS 50003-M45IL Super Fire Racing Spark Plugs M45iL Iridium (6 Pack)
HKSOriginal price $ 210.00 - Original price $ 210.00Original price$ 210.00$ 210.00 - $ 210.00Current price $ 210.00| /In stockHKS Super Fire Racing Spark Plugs M45iL (50003-M45IL) – Set of 6 A genuine HKS M-Series Super Fire Racing spark plug set built for reliable ignit...
View full detailsOriginal price $ 210.00 - Original price $ 210.00Original price$ 210.00$ 210.00 - $ 210.00Current price $ 210.00| / -
HKS 2022 Subaru BRZ / 2022 Toyota GR86 GTIII-RS Bolt On Turbo Kit
HKSOriginal price $ 5,800.00 - Original price $ 5,800.00Original price$ 5,800.00$ 5,800.00 - $ 5,800.00Current price $ 5,800.00| /Out of stockHKS 2022 Subaru BRZ / 2022 Toyota GR86 GTIII-RS Bolt On Turbo Kit
Original price $ 5,800.00 - Original price $ 5,800.00Original price$ 5,800.00$ 5,800.00 - $ 5,800.00Current price $ 5,800.00| /Sold out -
HKS HIPERMAX S VBH FULL CANCELLERKIT F PILLOW
HKSOriginal price $ 2,990.00 - Original price $ 2,990.00Original price$ 2,990.00$ 2,990.00 - $ 2,990.00Current price $ 2,990.00| /In stockHKS HIPERMAX S VBH FULL CANCELLERKIT F PILLOW
Original price $ 2,990.00 - Original price $ 2,990.00Original price$ 2,990.00$ 2,990.00 - $ 2,990.00Current price $ 2,990.00| / -
HKS FLOOR MATS FD3S FULL SET OCT LHD
HKSOriginal price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| /In stockHKS FLOOR MATS FD3S FULL SET OCT LHD
Original price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| / -
HKS FLOOR MATS BNR32 FULL SET OCT RHD
HKSOriginal price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| /In stockHKS FLOOR MATS BNR32 FULL SET OCT RHD
Original price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| / -
HKS Hi-Power Toyota/Subaru FA20 Spec-L2 Single Exhaust
HKSOriginal price $ 1,500.00 - Original price $ 1,500.00Original price$ 1,500.00$ 1,500.00 - $ 1,500.00Current price $ 1,500.00| /In stockHKS Hi-Power Toyota/Subaru FA20 Spec-L2 Single Exhaust
Original price $ 1,500.00 - Original price $ 1,500.00Original price$ 1,500.00$ 1,500.00 - $ 1,500.00Current price $ 1,500.00| / -
HKS FLOOR MATS JZA80 FULL SET OCT LHD
HKSOriginal price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| /In stockHKS FLOOR MATS JZA80 FULL SET OCT LHD
Original price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| / -
HKS FLOOR MATS FD3S FULL SET OCT RHD
HKSOriginal price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| /Low stockHKS FLOOR MATS FD3S FULL SET OCT RHD
Original price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| / -
HKS FLOOR MATS JZA80 FULL SET OCT RHD
HKSOriginal price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| /In stockHKS FLOOR MATS JZA80 FULL SET OCT RHD
Original price $ 610.00 - Original price $ 610.00Original price$ 610.00$ 610.00 - $ 610.00Current price $ 610.00| / -
HKS FLOOR MATS BCNR33 FULL SET OCT RHD
HKSOriginal price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| /In stockHKS FLOOR MATS BCNR33 FULL SET OCT RHD
Original price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| / -
HKS FLOOR MATS GZEA14H FULL SET OCT LHD
HKSOriginal price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| /In stockHKS FLOOR MATS GZEA14H FULL SET OCT LHD
Original price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| / -
HKS SUPER SQV4 RETURN KIT PLUS RZ34 VR30DDTT
HKSOriginal price $ 1,540.00 - Original price $ 1,540.00Original price$ 1,540.00$ 1,540.00 - $ 1,540.00Current price $ 1,540.00| /In stockHKS SUPER SQV4 RETURN KIT PLUS RZ34 VR30DDTT
Original price $ 1,540.00 - Original price $ 1,540.00Original price$ 1,540.00$ 1,540.00 - $ 1,540.00Current price $ 1,540.00| / -
HKS FLOOR MATS ZN8/ZD8 FULL SET OCT LHD
HKSOriginal price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| /In stockHKS FLOOR MATS ZN8/ZD8 FULL SET OCT LHD
Original price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| / -
HKS FLOOR MATS DB#2 FULL SET OCT LHD
HKSOriginal price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| /In stockHKS FLOOR MATS DB#2 FULL SET OCT LHD
Original price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| / -
HKS FLOOR MATS BNR34 FULL SET OCT RHD
HKSOriginal price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| /In stockHKS FLOOR MATS BNR34 FULL SET OCT RHD
Original price $ 660.00 - Original price $ 660.00Original price$ 660.00$ 660.00 - $ 660.00Current price $ 660.00| / -
HKS FLOOR MATS RZ34 FULL SET OCT LHD
HKSOriginal price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| /In stockHKS FLOOR MATS RZ34 FULL SET OCT LHD
Original price $ 550.00 - Original price $ 550.00Original price$ 550.00$ 550.00 - $ 550.00Current price $ 550.00| / -
HKS 89-94 Nissan Skyline GT-R E-BNR32 RB26DETT URBAN MATTE Edition Super Turbo Muffler
HKSOriginal price $ 1,620.00 - Original price $ 1,620.00Original price$ 1,620.00$ 1,620.00 - $ 1,620.00Current price $ 1,620.00| /Out of stockHKS 89-94 Nissan Skyline GT-R E-BNR32 RB26DETT URBAN MATTE Edition Super Turbo Muffler
Original price $ 1,620.00 - Original price $ 1,620.00Original price$ 1,620.00$ 1,620.00 - $ 1,620.00Current price $ 1,620.00| /Sold out -
HKS S Type O/C KIT No.12 BNR34 BLK
HKSOriginal price $ 1,220.00 - Original price $ 1,220.00Original price$ 1,220.00$ 1,220.00 - $ 1,220.00Current price $ 1,220.00| /Out of stockHKS S Type O/C KIT No.12 BNR34 BLK
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