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NGK Iridium IX Spark Plugs TR7IX for 2006-2009 Cadillac STS-V & XLR-V (Box of 4)

$90.60

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NGK Iridium IX Spark Plugs TR7IX for 2006-2009 Cadillac STS-V & XLR-V (Box of 4)

$90.60

$90.60

Fits 2006-2009 Cadillac STS-V and XLR-V.

NGK Iridium IX spark plugs are engineered for performance enthusiasts seeking improved throttle response and superior anti-fouling characteristics. The 0.6mm fine wire iridium center electrode is laser-welded for consistent spark and high durability, featuring a melting point significantly higher than platinum to withstand the intense heat of high-output engines. These plugs are an ideal upgrade for modified applications or as a premium replacement for OE nickel alloy plugs.

Each plug features a tapered cut ground electrode designed to reduce quenching, which improves starting, idling stability, and overall flame kernel expansion. The shells are treated with trivalent metal plating to provide long-lasting protection against corrosion and seizing in the cylinder head, ensuring easier removal during service intervals.

  • Manufacturer Part Number: TR7IX (3689)
  • Quantity: Box of 4
  • Center Electrode: Fine wire iridium tip
  • Ground Electrode: Tapered cut for improved ignitability
  • Finish: Trivalent metal plating for anti-corrosion/anti-seize
  • Application: Performance-tuned and modified engines
🔧 Fitment & Compatibility
Year Make Model Submodel
2006-2009 Cadillac STS V
2006-2009 Cadillac XLR V

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