Article no.:
7300
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NGK Iridium IX Spark Plug Box of 4 (TR4IX)
Unlock your engine's full potential with the NGK Iridium IX Spark Plug Box of 4 (TR4IX). Specifically designed for performance enthusiasts, these spark plugs deliver outstanding acceleration, high fuel efficiency, and exceptional durability.
With its tapered cut ground electrode and Iridium fine wire center electrode, this spark plug provides improved starting, idling, and throttle response. The Iridium alloy's extremely high melting point makes it perfect for today's engines.
- Recommended for modified or high-performance applications, or as an upgrade to OE nickel alloy spark plugs
- Provides outstanding acceleration, high fuel efficiency, and durability
- Exceptional anti-fouling and ignitability
This product fits more vehicles than loaded. Please select your vehicle to see all fits.
| Make | Model | Year | Type |
|---|---|---|---|
| Buick | Century | 1987 | Custom |
| Buick | Century | 1987 | Estate Wagon |
| Buick | Century | 1987 | Limited |
| Buick | Century | 1988 | Custom |
| Buick | Century | 1988 | Estate Wagon |
| Buick | Century | 1988 | Limited |
| Buick | Century | 1989 | Custom |
| Buick | Century | 1989 | Limited |
| Buick | Century | 1993 | Custom |
| Buick | Century | 1993 | Limited |
| Buick | Century | 1993 | Special |
| Buick | Lucerne | 2009 | CX |
| Buick | Lucerne | 2009 | CXL |
| Buick | Lucerne | 2010 | CX |
| Buick | Lucerne | 2010 | CXL |
| Buick | Lucerne | 2010 | CXL Special Edition |
| Buick | Lucerne | 2011 | CX |
| Buick | Lucerne | 2011 | CXL |
| Buick | Regal | 1988 | Custom |
| Buick | Regal | 1988 | Limited |
| Buick | Regal | 1989 | Custom |
| Buick | Regal | 1989 | Gran Sport |
| Buick | Regal | 1989 | Limited |
| Buick | Regal | 1990 | Custom |
| Buick | Regal | 1990 | Limited |
| Buick | Regal | 1991 | Custom |
| Buick | Regal | 1991 | Limited |
| Buick | Regal | 1992 | Custom |
| Buick | Regal | 1992 | Limited |
| Buick | Regal | 1993 | Custom |
| Buick | Regal | 1993 | Limited |
| Buick | Skyhawk | 1987 | Custom |
| Buick | Skyhawk | 1987 | Limited |
| Buick | Skyhawk | 1987 | Sport |
| Buick | Skyhawk | 1987 | T-Type |
| Buick | Skyhawk | 1988 | Custom |
| Buick | Skyhawk | 1988 | SE |
| Buick | Skyhawk | 1989 | Custom |
| Buick | Skyhawk | 1989 | SE |
| Buick | Terraza | 2006 | CX |
| Buick | Terraza | 2006 | CXL |
| Buick | Terraza | 2007 | CX |
| Buick | Terraza | 2007 | CXL |
| Cadillac | Cimarron | 1987 | Base |
| Cadillac | Cimarron | 1988 | Base |
| Chevrolet | Beretta | 1987 | Base |
| Chevrolet | Beretta | 1988 | Base |
| Chevrolet | Beretta | 1989 | Base |
| Chevrolet | Beretta | 1989 | GT |
| Chevrolet | Beretta | 1990 | Base |
| Chevrolet | Beretta | 1990 | GT |
| Chevrolet | Beretta | 1990 | Indianapolis 500 Pace Car |
| Chevrolet | Beretta | 1991 | Base |
| Chevrolet | Beretta | 1991 | GT |
| Chevrolet | Beretta | 1991 | GTZ |
| Chevrolet | Beretta | 1992 | Base |
| Chevrolet | Beretta | 1992 | GT |
| Chevrolet | Beretta | 1992 | GTZ |
| Chevrolet | Beretta | 1993 | Base |
| Chevrolet | Beretta | 1993 | GT |
| Chevrolet | Beretta | 1993 | GTZ |
| Chevrolet | Cavalier | 1987 | Base |
| Chevrolet | Cavalier | 1987 | CS |
| Chevrolet | Cavalier | 1987 | RS |
| Chevrolet | Cavalier | 1987 | Z24 |
| Chevrolet | Cavalier | 1988 | Base |
| Chevrolet | Cavalier | 1988 | RS |
| Chevrolet | Cavalier | 1988 | VL |
| Chevrolet | Cavalier | 1988 | Z24 |
| Chevrolet | Cavalier | 1989 | Base |
| Chevrolet | Cavalier | 1989 | RS |
| Chevrolet | Cavalier | 1989 | VL |
| Chevrolet | Cavalier | 1989 | Z24 |
| Chevrolet | Cavalier | 1990 | Base |
| Chevrolet | Cavalier | 1990 | RS |
| Chevrolet | Cavalier | 1990 | VL |
| Chevrolet | Cavalier | 1990 | Z24 |
| Chevrolet | Cavalier | 1991 | RS |
| Chevrolet | Cavalier | 1991 | VL |
| Chevrolet | Cavalier | 1991 | Z24 |
| Chevrolet | Cavalier | 1992 | RS |
| Chevrolet | Cavalier | 1992 | VL |
| Chevrolet | Cavalier | 1992 | Z24 |
| Chevrolet | Cavalier | 1993 | RS |
| Chevrolet | Cavalier | 1993 | VL |
| Chevrolet | Cavalier | 1993 | Z24 |
| Chevrolet | Cavalier | 1994 | RS |
| Chevrolet | Cavalier | 1994 | Z24 |
| Chevrolet | Celebrity | 1987 | Base |
| Chevrolet | Celebrity | 1987 | Estate |
| Chevrolet | Celebrity | 1987 | Eurosport |
| Chevrolet | Celebrity | 1988 | Base |
| Chevrolet | Celebrity | 1988 | Eurosport |
| Chevrolet | Celebrity | 1989 | Base |
| Chevrolet | Celebrity | 1989 | CL |
| Chevrolet | Celebrity | 1989 | Eurosport |
| Chevrolet | Celebrity | 1990 | Base |
| Chevrolet | Celebrity | 1990 | Eurosport |
| Chevrolet | Corsica | 1987 | Base |
| Chevrolet | Corsica | 1987 | LT |
NGK manufactures spark plugs and spark plug wires, as well as glow plugs for diesel applications. Their range of spark plugs cover everything from OEM replacement to Ultimate Performance plugs, and are available as traditional copper, platinum, or iridium tips. NGK’s reputation as an OEM supplier for many car manufacturers makes them a top choice for spark plugs. Few brands can make that claim and have the quality to back it up.
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