NGK Iridium TR6 IX Spark Plugs (.040 GAP) -  (Set of 8) GM LSx V8 (One Step Colder for Forced Induction/Nitrous) - 3689-8

NGK Iridium TR6 IX Spark Plugs (.040 GAP) - (Set of 8) GM LSx V8 (One Step Colder for Forced Induction/Nitrous) - 3689-8

NGK 3689-8

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Part Number:
3689-8
SKU:
3689-8
Availability:
Special Ordered - Not In Stock
DISCLAIMER - THIS ITEM IS A SPECIAL ORDERED PART:
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NGK V-Power Spark Plugs -.040 GAP

What GAP to use?

Prior to 2005 GM used .055 GAP spark plugs on all LSx motors. Starting in 2005, they switched to .040 GAP (this size) plugs to provide a better idle when things like cheap gas are encountered. Any LS2, LS3, L99, or LS7 will come from the factory with a .040 GAP

These TR6 IX Plugs are one step colder than TR55 plugs for nitrous and forced induction applications. 

Product Details-

Designed specifically for the performance enthusiast.  Iridium IX® offers extreme ignitability, improved throttle response and superior anti fouling

  • Fine Iridium tip ensures high durability and a consistently stable spark
  • Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
  • Outstanding acceleration, high fuel efficiency and durability
  • Ultimate design, technology and performance.

 

Fits most GM LSX (LS1, LS2, LS6, etc) applications.