50003-M40LF - HKS Iridium Spark Plugs


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Part #: 50003-M40LF
Notes: Super Fire Racing Spark Plug, Conical Seat Long Reach Type
Your Price: $26.97

Specs

Heat Range NGK # 8
Thread Size 14mm × 25mm
Wrench Size 16mm

This Item Also Available In

Part Number Price Notes & Specs
50003-M35LF $26.97 Notes Super Fire Racing Spark Plug, Conical Seat Long Reach Type
Heat Range NGK # 7
Thread Size 14mm × 25mm
Wrench Size 16mm

All Fitments

MAZDA
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
2006 - 2009 3 ALL L4 2.0 ALL ALL ALL From 6/2006 Thru 6/2009 Production Date; BKEP Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2009 3 ALL L4 2.3 N ALL ALL From 6/2006 Thru 6/2009 Production Date; BK3P Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2007 - 2009 3 MAZDASPEED L4 2.3 T MZR ALL From 6/2006 Thru 6/2009 Production Date; BK3P Chassis; Stock Plug/Heat Range: Conical Long Reach:6
2009 - 2011 3 ALL L4 2.0 N ALL ALL From 6/2009 Thru 8/2011 Production Date; BLEFP Chassis; Stock Plug/Heat Range: Conical Long Reach:6
2009 - 2013 3 ALL L4 2.0 ALL ALL ALL From 6/2009 Thru 11/2013 Production Date; BLEAP Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2009 - 2013 3 MAZDASPEED L4 2.3 T MZR ALL From 6/2009 Thru 11/2013 Production Date; BL3FW Chassis; Stock Plug/Heat Range: Conical Long Reach:6
2005 - 2007 6 ALL L4 2.3 N ALL ALL From 6/2005 Thru 12/2007 Production Date; GG3P Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2007 6 MAZDASPEED L4 2.3 T MZR ALL From 6/2005 Thru 12/2007 Production Date; GG3P Chassis; Stock Plug/Heat Range: Conical Long Reach:6
2008 - 2012 6 ALL L4 2.5 ALL ALL ALL From 1/2008 Thru 11/2012 Production Date; GH5FP/GH5AP Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2007 - 2011 CX-7 ALL L4 2.3 T MZR ALL From 12/2006 Thru 12/2011 Production Date; ER3P Chassis; Stock Plug/Heat Range: Conical Long Reach:5
2006 - 2014 MX-5 MIATA ALL L4 2.0 ALL ALL ALL From 8/2005 Production Date; NCEC Chassis; Stock Plug/Heat Range: Conical Long Reach:6

Product Description

ALL PLUGS SOLD INDIVIDUALLY

HKS S-Series Super Fire Racing Spark Plugs

HKS S-Series Super Fire Racing Spark Plugs are high performance Iridium plugs designed to handle advanced levels of tuning and still offer easy start-up and smooth idling.

  • 0.4mm diameter Iridium plug electrode core
  • U-shaped grooved electrode
  • S-Series Super Fire Spark Plugs are recommended for smooth cold starting, response and acceleration.

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.