SKU: 18257657724

HKS Super Fire Racing Spark Plug 50003-M40LF

Sale price$38.85 Regular price$43.17
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

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Description

HKS Super Fire Racing Spark Plug 50003-M40LFM 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: 14mm × 25mm
Wrench Size: 16mm

Fits:

2006 - 2009 MAZDA 3 L4 2.0 ALL From 6/2006 Thru 6/2009 Production Date  BKEP Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2009 MAZDA 3 L4 2.3 ALL From 6/2006 Thru 6/2009 Production Date  BK3P Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2009 - 2011 MAZDA 3 L4 2.0 ALL From 6/2009 Thru 8/2011 Production Date  BLEFP Chassis  Stock Plug/Heat Range: Conical Long Reach:6
2009 - 2013 MAZDA 3 L4 2.0 ALL From 6/2009 Thru 11/2013 Production Date  BLEAP Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2007 - 2009 MAZDA 3 L4 2.3 MZR From 6/2006 Thru 6/2009 Production Date  BK3P Chassis  Stock Plug/Heat Range: Conical Long Reach:6
2009 - 2013 MAZDA 3 L4 2.3 MZR From 6/2009 Thru 11/2013 Production Date  BL3FW Chassis  Stock Plug/Heat Range: Conical Long Reach:6
2005 - 2007 MAZDA 6 L4 2.3 ALL From 6/2005 Thru 12/2007 Production Date  GG3P Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2008 - 2012 MAZDA 6 L4 2.5 ALL From 1/2008 Thru 11/2012 Production Date  GH5FP/GH5AP Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2007 MAZDA 6 L4 2.3 MZR From 6/2005 Thru 12/2007 Production Date  GG3P Chassis  Stock Plug/Heat Range: Conical Long Reach:6
2007 - 2011 MAZDA CX-7 L4 2.3 MZR From 12/2006 Thru 12/2011 Production Date  ER3P Chassis  Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2014 MAZDA MX-5 MIATA L4 2.0 ALL From 8/2005 Production Date  NCEC Chassis  Stock Plug/Heat Range: Conical Long Reach: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: 18257657724

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Migs H
Natrona Heights, US
★★★★★ 5
Perfect fit .
Perfect fit for my 2008 BMW 335i.
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Reviewed in the United States on November 8, 2024
M
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Mary J Garcia Rivera
Phoenix, US
★★★★★ 5
Grand calidad y envío rápido
Excelente servicio y buen producto
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Reviewed in the United States on January 18, 2025
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Chance
Lake Worth, US
★★★★★ 5
Fit my 2008 328i BMW perfectly!
This fit my 328i BMW perfectly! It was easy installing the hose to engine on the top end. Connecting it to the water pump was a challenge, because the hose clamp was turned downward. If not for that, it would have been a breeze. Saved me hundreds of dollars. Buy this one!!
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Reviewed in the United States on October 24, 2022
E
Verified Purchase
E. E. Saulsberry
Massapequa, US
★★★★★ 5
Fit perfectly
Style: One Piece
Pops right in. Perfect fit and undistinguishable from the original.
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Reviewed in the United States on May 5, 2026
G
Verified Purchase
Green Beacon
Bozeman, US
★★★★★ 5
Great product!
Style: Two Pieces
These were a perfect fit for my MB and very easy to install. Great value for the money. They should last given the way they were built.
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Reviewed in the United States on November 14, 2025

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