SKU: 3545640379

HKS Super Fire Racing Spark Plug 50003-M50HL

$38.85 $43.17
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Description

HKS Super Fire Racing Spark Plug 50003-M50HLM Series Super Fire Spark Plugs HKS M Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti carbon build up. 0. 6mm Iridium Alloy Center Electrode Outer Electrode with Platinum Chip Short Type Outer Electrode (Anti Vibration) Thermal Edge Spark Support Gap M Series is recommended for reliable ignition, durability and anti carbon buildup under high load. The Iridium alloy is used

M-Series Super Fire Spark Plugs

HKS M-Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti-carbon build-up.

  • 0.6mm Iridium Alloy Center Electrode
  • Outer Electrode with Platinum Chip
  • Short Type Outer Electrode (Anti-Vibration)
  • Thermal Edge
  • Spark Support Gap

M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load.

The Iridium alloy is used because of its durability and reliability.  On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity.  With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration.  The Iridium plugs are available for multiple applications and offered in "colder" heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered.

Heat Range: NGK # 10
Thread Size: 12mm × 26.5mm
Wrench Size: 14mm

Fits:

2014 - 2015 HONDA ACCORD ALL 2.0 ELECTRIC/GAS LFA1 From 6/2013 Production Date  CR6 Chassis  HYBRID  Stock Plug/Heat Range: M12 Long Reach Hex14:7
2015 - 2016 HONDA FIT L4 1.5 ALL L15B1 From 9/2013 Production Date  GK5/GK6 Chassis  Stock Plug/Heat Range: M12 Long Reach Hex14:7
2011 - 2012 INFINITI G25 ALL 2.5 ALL VQ25HR From 11/2006 Thru 11/2013 Production Date  V36/NV36 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2007 - 2008 INFINITI G35 ALL 3.5 ALL VQ35HR From 11/2006 Thru 11/2013 Production Date  PV36 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2008 - 2013 INFINITI G37 ALL 3.7 ALL VQ37VHR From 10/2007 Thru 11/2013 Production Date  CKV36 Chassis  Coupe  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2008 - 2013 INFINITI G37 ALL 3.7 ALL VQ37VHR From 12/2008 Thru 11/2013 Production Date  KV36 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2011 - 2015 LEXUS CT200H ALL 43313 ALL ALL From 1/2011 Production Date  ZWA10 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2011 - 2013 MAZDA 3 L4 2.0 ALL ALL From 9/2011 Thru 11/2013 Production Date  BLFFP Chassis  SKYACTIV  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2012 - 2013 MAZDA 6 L4 2.5 ALL ALL From 11/2012 Production Date  GJ5FP Chassis  SKYACTIV  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2013 - 2016 MAZDA CX-5 L4 2.0 ALL ALL From 2/2012 Production Date  KEEFW.KEEAW Chassis  SKYACTIV  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2013 - 2016 MAZDA CX-5 L4 2.5 ALL ALL From 10/2013 Production Date  KE5FW.KE5AW Chassis  SKYACTIV  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2007 - 2009 NISSAN 350Z ALL 3.5 ALL VQ35HR From 1/2007 Thru 11/2008 Production Date  HZ33 Chassis  Roadster  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2007 - 2009 NISSAN 350Z ALL 3.5 ALL VQ35HR From 1/2007 Thru 11/2008 Production Date  Z33 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2009 - 2016 NISSAN 370Z ALL 3.7 ALL VQ37VHR From 12/2008 Production Date  Z34 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2009 - 2016 NISSAN GT-R V6 43315 ALL VR38DETT From 12/2007 Production Date  R35 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2011 - 2015 NISSAN JUKE ALL 43252 ALL MR16DDT From 11/2010 Production Date  F15 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2008 - 2013 NISSAN ROGUE ALL 43222 ALL QR25DE From 8/2007 Thru 12/2013 Production Date  TNT31 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2013 - 2016 SCION FR-S ALL ALL ALL ALL From 04/2012 Production Date  ZN6 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:9
2012 - 2015 SCION IQ ALL 43160 ALL 1NRFE From 8/2009 Production Date  NGJ10 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2013 - 2017 SUBARU BRZ ALL ALL ALL ALL From 03/2012 Production Date  ZC6 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:9
2014 - 2015 SUBARU FORESTER ALL 2.0 ALL FA20F From 11/2012 Production Date  SJG Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2012 - 2014 SUBARU LEGACY H4 2.5 ALL FB25 From 5/2012 Thru 6/2014 Production Date  BMM Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2013 - 2015 SUBARU LEGACY ALL 2.5 ALL FB25 From 10/2014 Production Date  BN9 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2012 - 2014 SUBARU OUTBACK H4 2.5 ALL FB25 From 5/2012 Thru 9/2014 Production Date  BRM Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2013 - 2015 SUBARU OUTBACK ALL 2.5 ALL FB25 From 10/2014 Production Date  BS9 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2015 - 2015 SUBARU WRX H4 2.0 ALL ALL From 8/2014 Production Date  VAG Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:8
2013 - 2015 SUBARU XV CROSSTREK ALL 2.0 GAS FB20 From 10/2012 Production Date  GP7 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2014 - 2015 SUBARU XV CROSSTREK ALL 2.0 ELECTRIC/GAS FB20 From 6/2013 Production Date  GPE Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:7
2017 - 2017 TOYOTA 86 ALL ALL ALL ALL From 04/2012 Production Date  ZN6 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:9
2006 - 2012 TOYOTA COROLLA ALL 43313 ALL 2ZRFE From 10/2006 Thru 4/2012 Production Date  ZRE142/ZRE144 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2006 - 2012 TOYOTA COROLLA ALL 43313 ALL 2ZRFE From 10/2006 Thru 4/2012 Production Date  ZRE142G/ZRE144G Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2007 - 2015 TOYOTA COROLLA ALL 43313 ALL 2ZRFE From 10/2007 Production Date  ZRE152N/ZRE154N Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2014 - 2015 TOYOTA COROLLA ALL 43313 ALL 2ZRFAE From 5/2012 Production Date  ZRE162G Chassis  Stock Plug/Heat Range: M12 Long Reach HEX14:6
2009 - 2015
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 3545640379

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4.4 ★★★★★
Based on 279 reviews
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Product Reviews
K
Verified Purchase
Kevin H.
West Palm Beach, US
★★★★★ 5
RV owner.
Excellent product. Delivers the shine and protection as advertised.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
C
Verified Purchase
Christina Mellies
Belleville, US
★★★★★ 5
Poli Glow used on bottom portion of the picture
Just put it on 21 foot RV, was impressed with the shine. Key is to make sure the applicator is moist. I periodically dampen with water. Realizing it wasn't going to revive the stickers. Question is How long it will last? What will it look like after it rains? Pictures attached, bottom portion was done with poli glow on June 7,2026 and I have just under a half of bottle left. Maybe I will update once it rains or how long the shine last.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
D
Verified Purchase
Diego
Cuba, US
★★★★★ 5
It works miracles
I was amazed by the incredible difference it made on my RV. Check the pictures. The difference is of such a magnitude that we were amazed by the final results. Brought my rig back to life
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 1, 2025
S
Verified Purchase
SMK
Alexandria, US
★★★★★ 5
This will work but prep is key!
I have an older RV that the gelcoat has dulled and is oxidized, but otherwise in good shape. I have buffed and polished in the past only for it to last a short time. I was looking up different products to try and this one has such good reviews, I thought I would give it a try. I bought the kit with the Poliglow and the Poliprep, with the scrubber and the microfiber glove. I started with the poliprep and it did a great job of gettting the streaks and black marks off. You spend a lot of time scrubbing to your likeness because anything that is still on the gelcoat when you apply the poliglow, it will be locked in there. The Poliglow is like a clearcoat that goes over the gelcoat. You have to build up layers and here are some of the tips and tricks I figured out that really helped my finished RV look great. First, make sure the applicator stays damp, this keeps the poliglow more uniform across the glove. Also, stick it in a zip lock bag when not using, you do not want it to dry out while you are using it. I found out that applying this in direct sunlight in warm temps, is the best method. This allows the poliglow to dry really fast. The first 3 or 4 layers will look streaky and dull but this is ok and as you build up the layers, the shine will come back. I found if you do this when its cooler, the layers do not dry as quick and you will get some permanent streaking or running. I had to remove a section I did in the evening because I noticed this. When in direct sunlight, this gave me the best results with no streaking or running. It dries fast and you can keep working. Like it says, do not do big sections at a time, keep it to small what you can reach sections and build those up and move on. As far as how much to buy? I have a 40 ft toy hauler and I got to kits and I had just enough to finish the whole thing minus the nose cap. I have Durabak on the nose cap, so I dont need to worry about that. I ended up buying one more bottle of the poliglow to have for my maintenance coats. Overall, I am pleased with how my 10 year old RV looks and other than some of the decals show age, it looks new again. If I were to buy a new RV, I would put this on right away and preserve the whole RV including the decals. Its not too expensive and its a lot of work, especially the prep, but it does end up with great results.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 21, 2023
G
Verified Purchase
Gary Watkins
Chelsea, US
★★★★★ 5
Excellent shine
Excellent line of products. Looking at the picture, you can see what the camper looked like before the Poli Glow. To the left of the window is the after Poli Glow. It takes some elbow grease (follow instructions well) but well worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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