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NGK Laser Iridium Spark Plug: MZR DISI (HR:6)
NGK Laser Iridium Spark Plug

Our Price: $19.00

Product Code: 3787

NGK Laser Iridium Spark Plugs
Applications: MAZDASPEED 6, MAZDASPEED 3, CX-7 (OE Replacement)
Part Number: 3787, ILTR6A-8G
Gap: .032" gap
Thread Size: 14mm
Reach: 26.5mm
Heat Range: 6 (stock heat range)


Laser Iridium spark plugs provide superior ignitability and long service life. Smallest tip diameter available Iridium / Platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions
  • Laser welded Iridium center electrode tip
  • Platinum disc welded to backside of ground electrode provides
  • long service life
  • “Trivalent Metal Plating” provides superior anti-corrosion and anti-seizing properties
  • Faster starts and quicker acceleration
  • Better fuel economy and lower emissions
  • Best OEM Iridium spark plug available
  • Original Equipment Manufacturer approved design

Average Customer Review: Average Customer Review: 4 of 5 4 of 5 Total Reviews: 1 Write a review.

  5 of 5 people found the following review helpful:
4 of 5 Stockers January 9, 2011
Reviewer: Chad Sparks from GLENPOOL, OK United States  
Just so everyone knows, these are basically the stock FoMoCo's that come in the car from the factory. They are factory heat range. These are laser iridiums, identical to stock. You can use these if you can't find the FoMoCo's which are usually only had at the stealership.

If you want something more, you can use the NGK IX in stock heat range, or Denso ITV22 for step colder. I wouldn't use Denso in stock heat range as the gap is wrong. I also wouldn't use NGK IX in step colder because the gap is wroung. So it's like this...

Stock = these NGK Laser Iridiums
Stock better = NGK IX
One step colder = Denso ITV22

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