NGK Iridium IX TR-55IX Spark Plugs (.055 GAP) – GM LSx V8 Applications (Set of 8) – NGK-7164-8

NGK�Iridium IX�Spark Plugs -.055 Plug Gap What GAP to use? Prior to 2005 GM used .055 GAP spark plugs on all LSx motors (this size). Starting in 2005, they switched to .040 GAP plugs�to provide a better idle�when things like cheap gas are�encountered. Either�a .060, or .040 GAP plug will work in any LSX motor with the smaller�GAP being best for daily driven, mildly modded cars.�� Best replacement plug for stock/midly modified LSx motors. � The Spark Plug Serious Enthusiasts Rely On 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� has 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. � � �