SKU: 51847930518

HKS Super Fire Racing Spark Plug 50003-M40XL

$38.85 $43.17
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

HKS Super Fire Racing Spark Plug 50003-M40XLM 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 # 8
Thread Size: 12mm × 26.5mm
Wrench Size: 16mm

Fits:

2014 - 2015 ACURA RLX ALL 3.5 ELECTRIC/GAS JNB1 From 1/2015 Production Date  KC2 Chassis  HYBRID  Stock Plug/Heat Range: M12 Long Reach Hex16:7
2008 - 2012 HONDA ACCORD L4 2.4 ALL K24Z2 From 12/2008 Production Date  CU2 Chassis  i-VTEC  Stock Plug/Heat Range: M12 Long Reach Hex16:7
2008 - 2008 MERCEDES-BENZ C300 ALL 3.0 ALL ALL From 6/2007 Production Date  DBA-204054 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX16:7
2007 - 2015 MINI COOPER ALL 1.6 ALL ALL From 2/2007 Production Date  ABA-MF16 Chassis  Stock Plug/Heat Range: M12 Long Reach HEX16:6
2008 - 2014 MINI COOPER ALL 1.6 ALL ALL From 10/2007 Production Date  Stock Plug/Heat Range: M12 Long Reach HEX16:6
2007 - 2015 MINI COOPER ALL 1.6 ALL ALL From 2/2007 Production Date  ABA-MF16S Chassis  Stock Plug/Heat Range: M12 Long Reach HEX16:7
2008 - 2014 MINI COOPER ALL 1.6 ALL ALL From 10/2007 Production Date  Stock Plug/Heat Range: M12 Long Reach HEX16:7
2008 - 2015 MITSUBISHI LANCER ALL 2.0 ALL 4B11 From 10/2007 Production Date  CZ4A Chassis  DOHC MIVEC  Stock Plug/Heat Range: M12 Long Reach HEX16:8
2007 - 2012 MITSUBISHI OUTLANDER ALL 3.0 ALL 6B31 From 9/2007 Thru 10/2012 Production Date  CW6W Chassis  Stock Plug/Heat Range: M12 Long Reach HEX16:7
2012 - 2012 MITSUBISHI OUTLANDER ALL 2.4 ALL 4B12 From 10/2012 Production Date  GF8W Chassis  Stock Plug/Heat Range: M12 Long Reach HEX16:6
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: 51847930518

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4.8 ★★★★★
Based on 26 reviews
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Product Reviews
L
Verified Purchase
Lynette
Whiting, US
★★★★★ 2
not indestructible
Color: 1PC
My dog ate through it in 4 days. The bear is not indestructible. It died a very undignified death. I am convinced that my dog was a goat in a past life. He eats everything that is not nailed down.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
S
Verified Purchase
Stephanie P.
Lake Worth, US
★★★★★ 1
Not worth the money
Color: 1PC, Color: 1PC
DO NOY BUY!! It lasted not even 3 minutes with my 6 year old rottie. She bit right through the nose and pulled out the stuffing. Don't waste your money!! I would give it zero stars if I could!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
K
Verified Purchase
KATHLEEN PATTERSON
Draper, US
★★★★★ 1
Not good for an aggressive chewer
Color: 1PC
This toy is not indestructible. My little Aussie had one ear off and its neck cut in less then 6 hours and by the next day he had the foot chewed off. It is cute and he loved it, but it is stuffed and not really safe for an aggressive chewer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
N
Verified Purchase
Natasha Bowman
Whiting, US
★★★★★ 3
It is not a good product for a dog. I didn’t even last five minutes.
Color: 1PC, Color: 1PC
I received this package and I just gave it to my dog. Doesn’t last five minutes. It’s already tore up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 1
A real review.
Color: 2PC, Color: 2PC
When I saw the Unbreakable Teddy Extreme Bear 2.0, I thought, Finally! A toy that might survive my 9-month-old Rottweiler puppy, Pepper. She’s an aggressive chewer with a love for stuffies—she adores them, right up until she disembowels them and feasts on their cotton insides like a tiny, unhinged zombie. The toy’s name, "Unbreakabear," sounded promising. Durable? Stuffie-like? For large breeds? Sign me up! Fifteen minutes later, it looked like a crime scene from a horror movie. The Good: Pepper was IN LOVE with this toy... for about 10 minutes. The double pack is nice in theory—you know, so you have a backup when the first one inevitably doesn’t live up to its "unbreakable" promise. The Bad: False Advertising: This toy is marketed as "extremely durable for aggressive chewers." But let me tell you: Pepper’s chewing isn’t aggressive—it’s surgical. She shredded the bear’s ears, ripped off the tail, and then went straight for the brain like she was auditioning for Zombie Dogs Gone Wild. It didn’t even put up a fight. Durability (or Lack Thereof): Calling this toy "extreme" is like calling a paper towel roll a chew toy. One good shake, and the seams basically exploded in surrender. Safety Concerns: Once Pepper exposed the stuffing (and the metaphorical "brains"), it was a race to see if I could stop her from swallowing it. Stuffing everywhere. The floor looked like someone had murdered a carnival bear. The Ugly: Walking into the room after Pepper was done was like stumbling upon the aftermath of a teddy bear massacre. The "Unbreakabear" lay limp on the floor, its ears and tail missing, stuffing spewed around like it was the victim of a bear-sized horror flick. Pepper, triumphant, sat there with bits of fluff clinging to her mouth, looking like a deranged extra from The Walking Dead. Final Thoughts: If your dog is a light chewer who likes to gently cuddle their toys, this might be fine. But if your dog sees toys as a challenge, run. Stick to hard rubber toys, Kongs, or something without a vulnerable, squishy middle. As for the warranty? Sure, I could try to get a replacement, but what’s the point? Pepper will just go full zombie surgeon again. Would I recommend this toy? Only if you’re filming a sequel to Teddy Bear Massacre. For aggressive chewers, this is nothing but fluff and disappointment. Pepper’s Review: 5/5 stars for taste. 0/5 stars for durability.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2025

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