NGK IX Iridium TR55IX Spark Plug (Box of 4) — Fits 1989-1994 Ford, Chevrolet, Cadillac

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK Iridium IX TR55IX Spark Plugs: Unleash Peak Performance

Designed for the true performance enthusiast, NGK Iridium IX TR55IX spark plugs deliver an unparalleled ignition experience. These plugs are engineered to provide outstanding acceleration, improved fuel efficiency, and exceptional durability, making them the ideal upgrade for demanding engines. Experience the difference that advanced iridium technology makes in your vehicle's responsiveness and overall power.

Advanced Iridium Technology for Superior Ignition:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a consistent, powerful spark for optimal combustion.
  • Exceptional Anti-Fouling: Resists carbon buildup, maintaining peak performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother driving experience.
  • Iridium Fine Wire Center Electrode: Six times harder than platinum, offering superior durability and longevity.
  • High Melting Point Iridium Alloy: Perfectly suited for the high temperatures and demands of modern engines.

Upgrade your ignition system with confidence. These plugs are a perfect fit for a wide range of vehicles, including 1989-1994 Ford Ranger, Chevrolet Corvette, and Cadillac Fleetwood models. For even greater performance, consider upgrading to an NGK Ruthenium HX plug. Find your NGK Iridium IX spark plugs at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2003 Aston Martin DB7 Vantage
2002-2003 Aston Martin DB7 Vantage Volante
2003 Aston Martin DB7 GT
2003 Aston Martin DB7 GTA
1989 Buick Century Estate Wagon
1989-1993 Buick Century Limited
1989-2005 Buick Century Custom
1991-1996 Buick Century Special
1996-2002 Buick Century Limited
2004-2005 Buick Century Limited
2005 Buick Century Special Edition
1994-1996 Buick Commercial Chassis Base
1988-1990 Buick Electra T-Type
1988-1990 Buick Electra Limited
1988-1990 Buick Electra Park Avenue
1989-1990 Buick Electra Park Avenue Ultra
2005-2009 Buick LaCrosse CX
2005-2009 Buick LaCrosse CXL
1988-1991 Buick LeSabre Base
1988-2005 Buick LeSabre Custom
1988-2005 Buick LeSabre Limited
2006-2008 Buick Lucerne CX
2006-2008 Buick Lucerne CXL
2006-2008 Buick Lucerne CXS
2008-2011 Buick Lucerne Super
1991-2005 Buick Park Avenue Base
1991-2005 Buick Park Avenue Ultra
1988-1991 Buick Reatta Base
1990-1996 Buick Regal Custom
1990-1996 Buick Regal Gran Sport
1990-1996 Buick Regal Limited
1996 Buick Regal Olympic Gold Edition
1997-2004 Buick Regal GS
1997-2004 Buick Regal LS
1998 Buick Regal 25th Anniversary Edition
2000 Buick Regal GSE
2000 Buick Regal LSE
2002-2003 Buick Rendezvous CX Plus
2002-2003 Buick Rendezvous CXL Plus
2002-2007 Buick Rendezvous CX
2002-2007 Buick Rendezvous CXL
2005 Buick Rendezvous CX Plus
1988-1989 Buick Riviera T-Type
1988-1993 Buick Riviera Luxury
1995-1999 Buick Riviera Base
1994-1995 Buick Roadmaster Base
1994-1995 Buick Roadmaster Estate Wagon
1994-1995 Buick Roadmaster Limited
1996 Buick Roadmaster Collector's Edition
1996 Buick Roadmaster Estate Wagon Collector's Edition
1996 Buick Roadmaster Limited Collector's Edition
1989 Buick Skylark Limited
1989-1998 Buick Skylark Custom
1990-1991 Buick Skylark Luxury Edition
1990-1997 Buick Skylark Gran Sport
1991 Buick Skylark Base
1993-1997 Buick Skylark Limited
1996 Buick Skylark Olympic Gold Edition
2005-2006 Buick Terraza CX
2005-2006 Buick Terraza CXL

…and 273 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK Iridium IX TR55IX Spark Plugs: Unleash Peak Performance

Designed for the true performance enthusiast, NGK Iridium IX TR55IX spark plugs deliver an unparalleled ignition experience. These plugs are engineered to provide outstanding acceleration, improved fuel efficiency, and exceptional durability, making them the ideal upgrade for demanding engines. Experience the difference that advanced iridium technology makes in your vehicle's responsiveness and overall power.

Advanced Iridium Technology for Superior Ignition:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a consistent, powerful spark for optimal combustion.
  • Exceptional Anti-Fouling: Resists carbon buildup, maintaining peak performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother driving experience.
  • Iridium Fine Wire Center Electrode: Six times harder than platinum, offering superior durability and longevity.
  • High Melting Point Iridium Alloy: Perfectly suited for the high temperatures and demands of modern engines.

Upgrade your ignition system with confidence. These plugs are a perfect fit for a wide range of vehicles, including 1989-1994 Ford Ranger, Chevrolet Corvette, and Cadillac Fleetwood models. For even greater performance, consider upgrading to an NGK Ruthenium HX plug. Find your NGK Iridium IX spark plugs at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2003 Aston Martin DB7 Vantage
2002-2003 Aston Martin DB7 Vantage Volante
2003 Aston Martin DB7 GT
2003 Aston Martin DB7 GTA
1989 Buick Century Estate Wagon
1989-1993 Buick Century Limited
1989-2005 Buick Century Custom
1991-1996 Buick Century Special
1996-2002 Buick Century Limited
2004-2005 Buick Century Limited
2005 Buick Century Special Edition
1994-1996 Buick Commercial Chassis Base
1988-1990 Buick Electra T-Type
1988-1990 Buick Electra Limited
1988-1990 Buick Electra Park Avenue
1989-1990 Buick Electra Park Avenue Ultra
2005-2009 Buick LaCrosse CX
2005-2009 Buick LaCrosse CXL
1988-1991 Buick LeSabre Base
1988-2005 Buick LeSabre Custom
1988-2005 Buick LeSabre Limited
2006-2008 Buick Lucerne CX
2006-2008 Buick Lucerne CXL
2006-2008 Buick Lucerne CXS
2008-2011 Buick Lucerne Super
1991-2005 Buick Park Avenue Base
1991-2005 Buick Park Avenue Ultra
1988-1991 Buick Reatta Base
1990-1996 Buick Regal Custom
1990-1996 Buick Regal Gran Sport
1990-1996 Buick Regal Limited
1996 Buick Regal Olympic Gold Edition
1997-2004 Buick Regal GS
1997-2004 Buick Regal LS
1998 Buick Regal 25th Anniversary Edition
2000 Buick Regal GSE
2000 Buick Regal LSE
2002-2003 Buick Rendezvous CX Plus
2002-2003 Buick Rendezvous CXL Plus
2002-2007 Buick Rendezvous CX
2002-2007 Buick Rendezvous CXL
2005 Buick Rendezvous CX Plus
1988-1989 Buick Riviera T-Type
1988-1993 Buick Riviera Luxury
1995-1999 Buick Riviera Base
1994-1995 Buick Roadmaster Base
1994-1995 Buick Roadmaster Estate Wagon
1994-1995 Buick Roadmaster Limited
1996 Buick Roadmaster Collector's Edition
1996 Buick Roadmaster Estate Wagon Collector's Edition
1996 Buick Roadmaster Limited Collector's Edition
1989 Buick Skylark Limited
1989-1998 Buick Skylark Custom
1990-1991 Buick Skylark Luxury Edition
1990-1997 Buick Skylark Gran Sport
1991 Buick Skylark Base
1993-1997 Buick Skylark Limited
1996 Buick Skylark Olympic Gold Edition
2005-2006 Buick Terraza CX
2005-2006 Buick Terraza CXL

…and 273 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK Iridium IX TR55IX Spark Plugs: Unleash Peak Performance

Designed for the true performance enthusiast, NGK Iridium IX TR55IX spark plugs deliver an unparalleled ignition experience. These plugs are engineered to provide outstanding acceleration, improved fuel efficiency, and exceptional durability, making them the ideal upgrade for demanding engines. Experience the difference that advanced iridium technology makes in your vehicle's responsiveness and overall power.

Advanced Iridium Technology for Superior Ignition:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a consistent, powerful spark for optimal combustion.
  • Exceptional Anti-Fouling: Resists carbon buildup, maintaining peak performance over time.
  • Tapered Cut Ground Electrode: Improves starting, idling stability, and throttle response for a smoother driving experience.
  • Iridium Fine Wire Center Electrode: Six times harder than platinum, offering superior durability and longevity.
  • High Melting Point Iridium Alloy: Perfectly suited for the high temperatures and demands of modern engines.

Upgrade your ignition system with confidence. These plugs are a perfect fit for a wide range of vehicles, including 1989-1994 Ford Ranger, Chevrolet Corvette, and Cadillac Fleetwood models. For even greater performance, consider upgrading to an NGK Ruthenium HX plug. Find your NGK Iridium IX spark plugs at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2003 Aston Martin DB7 Vantage
2002-2003 Aston Martin DB7 Vantage Volante
2003 Aston Martin DB7 GT
2003 Aston Martin DB7 GTA
1989 Buick Century Estate Wagon
1989-1993 Buick Century Limited
1989-2005 Buick Century Custom
1991-1996 Buick Century Special
1996-2002 Buick Century Limited
2004-2005 Buick Century Limited
2005 Buick Century Special Edition
1994-1996 Buick Commercial Chassis Base
1988-1990 Buick Electra T-Type
1988-1990 Buick Electra Limited
1988-1990 Buick Electra Park Avenue
1989-1990 Buick Electra Park Avenue Ultra
2005-2009 Buick LaCrosse CX
2005-2009 Buick LaCrosse CXL
1988-1991 Buick LeSabre Base
1988-2005 Buick LeSabre Custom
1988-2005 Buick LeSabre Limited
2006-2008 Buick Lucerne CX
2006-2008 Buick Lucerne CXL
2006-2008 Buick Lucerne CXS
2008-2011 Buick Lucerne Super
1991-2005 Buick Park Avenue Base
1991-2005 Buick Park Avenue Ultra
1988-1991 Buick Reatta Base
1990-1996 Buick Regal Custom
1990-1996 Buick Regal Gran Sport
1990-1996 Buick Regal Limited
1996 Buick Regal Olympic Gold Edition
1997-2004 Buick Regal GS
1997-2004 Buick Regal LS
1998 Buick Regal 25th Anniversary Edition
2000 Buick Regal GSE
2000 Buick Regal LSE
2002-2003 Buick Rendezvous CX Plus
2002-2003 Buick Rendezvous CXL Plus
2002-2007 Buick Rendezvous CX
2002-2007 Buick Rendezvous CXL
2005 Buick Rendezvous CX Plus
1988-1989 Buick Riviera T-Type
1988-1993 Buick Riviera Luxury
1995-1999 Buick Riviera Base
1994-1995 Buick Roadmaster Base
1994-1995 Buick Roadmaster Estate Wagon
1994-1995 Buick Roadmaster Limited
1996 Buick Roadmaster Collector's Edition
1996 Buick Roadmaster Estate Wagon Collector's Edition
1996 Buick Roadmaster Limited Collector's Edition
1989 Buick Skylark Limited
1989-1998 Buick Skylark Custom
1990-1991 Buick Skylark Luxury Edition
1990-1997 Buick Skylark Gran Sport
1991 Buick Skylark Base
1993-1997 Buick Skylark Limited
1996 Buick Skylark Olympic Gold Edition
2005-2006 Buick Terraza CX
2005-2006 Buick Terraza CXL

…and 273 additional fitments. Contact us to confirm yours.

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