# NGK IX Iridium Spark Plug Box of 4 (TR55IX) NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug. - RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs - Trivalent metal plating for superior anti-corrosion and anti-seizing properties - Outstanding acceleration, high fuel efficiency and durability - Fine iridium tip ensures durable and consistent spark This Part Fits: Year Make Model Submodel 2003 Aston Martin DB7 GT 2003 Aston Martin DB7 GTA 2002-2003 Aston Martin DB7 Vantage 2002-2003 Aston Martin DB7 Vantage Volante 1989-2005 Buick Century Custom 1989 Buick Century Estate Wagon 1989-1993,1996-2002,2004-2005 Buick Century Limited 1991-1996 Buick Century Special 2005 Buick Century Special Edition 1994-1996 Buick Commercial Chassis Base 1988-1990 Buick Electra Limited 1988-1990 Buick Electra Park Avenue 1989-1990 Buick Electra Park Avenue Ultra 1988-1990 Buick Electra T-Type 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 1998 Buick Regal 25th Anniversary Edition 1990-1996 Buick Regal Custom 1990-1996 Buick Regal Gran Sport 1997-2004 Buick Regal GS 2000 Buick Regal GSE 1990-1996 Buick Regal Limited 1997-2004 Buick Regal LS 2000 Buick Regal LSE 1996 Buick Regal Olympic Gold Edition 2002-2007 Buick Rendezvous CX 2002-2003,2005 Buick Rendezvous CX Plus 2002-2007 Buick Rendezvous CXL 2002-2003 Buick Rendezvous CXL Plus 1995-1999 Buick Riviera Base 1988-1993 Buick Riviera Luxury 1988-1989 Buick Riviera T-Type 1994-1995 Buick Roadmaster Base 1996 Buick Roadmaster Collector's Edition 1994-1995 Buick Roadmaster Estate Wagon 1996 Buick Roadmaster Estate Wagon Collector's Edition 1994-1995 Buick Roadmaster Limited 1996 Buick Roadmaster Limited Collector's Edition 1991 Buick Skylark Base 1989-1998 Buick Skylark Custom 1990-1997 Buick Skylark Gran Sport 1989,1993-1997 Buick Skylark Limited 1990-1991 Buick Skylark Luxury Edition 1996 Buick Skylark Olympic Gold Edition 2005-2006 Buick Terraza CX 2005-2006 Buick Terraza CXL 1993 Cadillac 60 Special Base 1987-1993 Cadillac Allante Base 1993 Cadillac Allante Indianapolis 500 Pace Car 1990-1993 Cadillac Allante Value Leader 1985-1996 Cadillac Commercial Chassis Base 1994-1996 Cadillac Commercial Chassis Brougham 1982-1985,1987-2005 Cadillac DeVille Base 1982-1985 Cadillac DeVille Cabriolet 1994-1999 Cadillac DeVille Concours 1982-1987,1996-1999 Cadillac DeVille d'Elegance 2000-2005 Cadillac DeVille DHS 2000-2005 Cadillac DeVille DTS 2004-2005 Cadillac DeVille Protection Series 1991 Cadillac DeVille Spring Edition 1986-1987,1991-1993 Cadillac DeVille Touring 2006-2011 Cadillac DTS Base 2010-2011 Cadillac DTS Livery 2007-2011 Cadillac DTS Luxury 2008-2011 Cadillac DTS Platinum 2010-2011 Cadillac DTS Premium 1982-1997 Cadillac Eldorado Base 1982-1991 Cadillac Eldorado Biarritz 1982-1985 Cadillac Eldorado Cabriolet 1998-2002 Cadillac Eldorado ESC 1995-2002 Cadillac Eldorado ETC 1993 Cadillac Eldorado Sport 1991 Cadillac Eldorado Spring Edition 1982-1985,1990-1994 Cadillac Eldorado Touring 1999-2000 Cadillac Escalade Base 1987-1992 Cadillac Fleetwood 60 Special 1985-1987 Cadillac Fleetwood 75 1985-1987 Cadillac Fleetwood 75 Formal 1985-1992,1994-1996 Cadillac Fleetwood Base 1982-1985,1994-1996 Cadillac Fleetwood Brougham 1985-1989 Cadillac Fleetwood Brougham Commercial Chassis 1982-1985 Cadillac Fleetwood Brougham d'Elegance 1985,1987-1992 Cadillac Fleetwood d'Elegance 1982-1993 Cadillac Seville Base 1982-1986 Cadillac Seville Elegante 1994-2004 Cadillac Seville SLS 1988-2003 Cadillac Seville STS 2007-2009 Cadillac SRX Base 2007-2010 Cadillac STS Base 2008-2009 Cadillac STS Platinum 2007-2008 Cadillac XLR Base 2008-2009 Cadillac XLR Platinum 1996-2005 Chevrolet Astro Base 1996-2005 Chevrolet Astro LS 1996-2005 Chevrolet Astro LT 2002-2004 Chevrolet Avalanche 2500 Base 2005-2006 Chevrolet Avalanche 2500 LS 2005-2006 Chevrolet Avalanche 2500 LT 1994-1996 Chevrolet Beretta Base 1994-1996 Chevrolet Beretta Z26 1996-1999,2005 Chevrolet Blazer Base 1996-2004 Chevrolet Blazer LS 1996-2001 Chevrolet Blazer LT 1999-2001 Chevrolet Blazer Trailblazer 2001-2005 Chevrolet Blazer Xtreme 2003-2005 Chevrolet Blazer ZR2 1996-1997 Chevrolet C1500 Base 1996-1998 Chevrolet C1500 Cheyenne 1999 Chevrolet C1500 LS 1996-1998 Chevrolet C1500 Silverado 1996-1998 Chevrolet C1500 WT 1996-1999 Chevrolet C1500 Suburban Base 1996-1999 Chevrolet C1500 Suburban LS 1996-1997,1999 Chevrolet C1500 Suburban LT 1996-1997,1999-2000 Chevrolet C2500 Base 1993,1996-1998 Chevrolet C2500 Cheyenne 1999-2000 Chevrolet C2500 LS 1993,1996-1998 Chevrolet C2500 Silverado 1998 Chevrolet C2500 WT 1996-1999 Chevrolet C2500 Suburban Base 1996-1999 Chevrolet C2500 Suburban LS 1996-1997 Chevrolet C2500 Suburban LT 1996-1997,1999-2000 Chevrolet C3500 Base 1996-1998 Chevrolet C3500 Cheyenne 1999-2000 Chevrolet C3500 LS 1996-1998 Chevrolet C3500 Silverado 1995-2002 Chevrolet Camaro Base 1993 Chevrolet Camaro Indianapolis 500 Pace Car 1996-1997 Chevrolet Camaro RS 1993-1997 Chevrolet Camaro Z28 1994-1996 Chevrolet Caprice Classic 1994 Chevrolet Caprice Classic LS 1995-2002 Chevrolet Cavalier LS 2002 Chevrolet Cavalier LS Sport 1995-2002 Chevrolet Cavalier Z24 1994-1996 Chevrolet Corsica Base 1993 Chevrolet Corvette 40th Anniversary Edition 1992-1996 Chevrolet Corvette Base 1996 Chevrolet Corvette Collector's Edition 1996 Chevrolet Corvette Grand Sport 1995 Chevrolet Corvette Indianapolis 500 Pace Car 2005-2009 Chevrolet Equinox LS 2005-2009 Chevrolet Equinox LT 2008-2009 Chevrolet Equinox LTZ 1996-2012 Chevrolet Express 1500 Base 1996-2006 Chevrolet Express 1500 LS 2001-2002,2006 Chevrolet Express 1500 LT 1996-2006 Chevrolet Express 2500 Base 1996-2005 Chevrolet Express 2500 LS 1996-2002 Chevrolet Express 3500 Base 1996-2002 Chevrolet Express 3500 LS 1995 Chevrolet G30 Beauville 1995 Chevrolet G30 Chevy Van 1995 Chevrolet G30 Hi-Cube 1995 Chevrolet G30 Sportvan 2000-2005 Chevrolet Impala Base 2000-2005 Chevrolet Impala LS 2003 Chevrolet Impala LS Sport 2003-2005 Chevrolet Impala Police 1994-1996,2004-2005 Chevrolet Impala SS 1996-1997 Chevrolet K1500 Base 1996-1998 Chevrolet K1500 Cheyenne 1999 Chevrolet K1500 LS 1996-1998 Chevrolet K1500 Silverado 1996-1998 Chevrolet K1500 WT 1996-1999 Chevrolet K1500 Suburban Base 1996-1999 Chevrolet K1500 Suburban LS 1996-1997,1999 Chevrolet K1500 Suburban LT 1996-1997,1999-2000 Chevrolet K2500 Base 1996-1998 Chevrolet K2500 Cheyenne 1999-2000 Chevrolet K2500 LS 1996-1998 Chevrolet K2500 Silverado 1998 Chevrolet K2500 WT 1996-1999 Chevrolet K2500 Suburban Base 1996-1999 Chevrolet K2500 Suburban LS 1996-1997 Chevrolet K2500 Suburban LT 1996-1997,1999-2000 Chevrolet K3500 Base 1996-1998 Chevrolet K3500 Cheyenne 1999-2000 Chevrolet K3500 LS 1996-1998 Chevrolet K3500 Silverado 1995-2001 Chevrolet Lumina Base 1995-1999 Chevrolet Lumina LS 1997-1999 Chevrolet Lumina LTZ 1992-1996 Chevrolet Lumina APV Base 1992 Chevrolet Lumina APV CL 1993-1996 Chevrolet Lumina APV LS 1997-2003 Chevrolet Malibu Base 1997-2006 Chevrolet Malibu LS 2004-2006 Chevrolet Malibu LT 2006 Chevrolet Malibu LTZ ## Details - **Price:** 74.61 CAD - **Vendor:** NGK - **Type:** Spark Plugs ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 74.61 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - out of package - Photo - out of package --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/ngk-ix-iridium-spark-plug-box-of-4-tr55ix) > Updated: 2026-06-28