Article no.:
7355
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NGK Iridium IX Spark Plug Box of 4 (XR5IX)
Unlock the full potential of your vehicle with the NGK Iridium IX Spark Plug Box of 4 (XR5IX). Designed for performance enthusiasts, these spark plugs provide outstanding acceleration, high fuel efficiency, and durability.
With its tapered cut ground electrode, the NGK Iridium IX Spark Plug ensures improved starting, idling, and throttle response. The iridium fine wire center electrode is six times harder than platinum, ensuring exceptional durability and performance.
- Extreme ignitability and anti-fouling properties
- Improved starting, idling, and throttle response
- Durable iridium fine wire center electrode
- Perfect for modified or high-performance applications
This product fits more vehicles than loaded. Please select your vehicle to see all fits.
| Make | Model | Year | Type |
|---|---|---|---|
| Buick | Electra | 1965 | Base |
| Buick | Electra | 1966 | Base |
| Buick | Electra | 1966 | Custom |
| Buick | Gran Sport | 1966 | Base |
| Buick | LeSabre | 1964 | Base |
| Buick | LeSabre | 1966 | Base |
| Buick | LeSabre | 1966 | Custom |
| Buick | LeSabre | 1967 | Base |
| Buick | LeSabre | 1967 | Custom |
| Buick | Riviera | 1963 | Base |
| Buick | Riviera | 1964 | Base |
| Buick | Riviera | 1965 | Base |
| Buick | Riviera | 1965 | Gran Sport |
| Buick | Riviera | 1966 | Base |
| Buick | Riviera | 1966 | Gran Sport |
| Buick | Roadmaster | 1951 | Base |
| Buick | Skylark | 1964 | Base |
| Buick | Skylark | 1965 | Base |
| Buick | Skylark | 1966 | Base |
| Buick | Skylark | 1967 | Base |
| Buick | Special | 1964 | Base |
| Buick | Special | 1964 | Deluxe |
| Buick | Special | 1965 | Base |
| Buick | Special | 1965 | Deluxe |
| Buick | Special | 1966 | Base |
| Buick | Special | 1966 | Deluxe |
| Buick | Special | 1967 | Base |
| Buick | Special | 1967 | Deluxe |
| Buick | Sportwagon | 1964 | Base |
| Buick | Wildcat | 1964 | Base |
| Buick | Wildcat | 1965 | Base |
| Buick | Wildcat | 1965 | Custom |
| Buick | Wildcat | 1965 | Deluxe |
| Buick | Wildcat | 1966 | Base |
| Buick | Wildcat | 1966 | Custom |
| Buick | Wildcat | 1966 | Gran Sport |
| Cadillac | Calais | 1965 | Base |
| Cadillac | Calais | 1966 | Base |
| Cadillac | DeVille | 1953 | Base |
| Cadillac | DeVille | 1954 | Base |
| Cadillac | DeVille | 1955 | Base |
| Cadillac | DeVille | 1956 | Base |
| Cadillac | DeVille | 1958 | Base |
| Cadillac | DeVille | 1959 | Base |
| Cadillac | DeVille | 1960 | Base |
| Cadillac | DeVille | 1961 | Base |
| Cadillac | DeVille | 1962 | Base |
| Cadillac | DeVille | 1963 | Base |
| Cadillac | DeVille | 1964 | Base |
| Cadillac | DeVille | 1965 | Base |
| Cadillac | DeVille | 1966 | Base |
| Cadillac | Eldorado | 1953 | Base |
| Cadillac | Eldorado | 1954 | Base |
| Cadillac | Eldorado | 1955 | Base |
| Cadillac | Eldorado | 1956 | Base |
| Cadillac | Eldorado | 1957 | Base |
| Cadillac | Eldorado | 1957 | Brougham |
| Cadillac | Eldorado | 1958 | Base |
| Cadillac | Eldorado | 1959 | Base |
| Cadillac | Eldorado | 1959 | Brougham |
| Cadillac | Eldorado | 1960 | Base |
| Cadillac | Eldorado | 1960 | Brougham |
| Cadillac | Eldorado | 1961 | Base |
| Cadillac | Eldorado | 1962 | Base |
| Cadillac | Eldorado | 1963 | Base |
| Cadillac | Eldorado | 1963 | Biarritz |
| Cadillac | Eldorado | 1964 | Base |
| Cadillac | Eldorado | 1964 | Biarritz |
| Cadillac | Eldorado | 1965 | Base |
| Cadillac | Eldorado | 1966 | Base |
| Cadillac | Fleetwood | 1965 | 60 Special |
| Cadillac | Fleetwood | 1965 | 75 |
| Cadillac | Fleetwood | 1966 | 60 Special |
| Cadillac | Fleetwood | 1966 | 75 |
| Cadillac | Fleetwood | 1966 | Base |
| Cadillac | Series 60 Fleetwood | 1953 | Base |
| Cadillac | Series 60 Fleetwood | 1954 | Base |
| Cadillac | Series 60 Fleetwood | 1955 | Base |
| Cadillac | Series 60 Fleetwood | 1956 | Base |
| Cadillac | Series 60 Fleetwood | 1957 | Base |
| Cadillac | Series 60 Fleetwood | 1958 | Base |
| Cadillac | Series 60 Fleetwood | 1959 | Base |
| Cadillac | Series 60 Fleetwood | 1960 | Base |
| Cadillac | Series 60 Fleetwood | 1961 | Base |
| Cadillac | Series 60 Fleetwood | 1962 | Base |
| Cadillac | Series 60 Fleetwood | 1963 | Base |
| Cadillac | Series 60 Fleetwood | 1964 | Base |
| Cadillac | Series 62 | 1953 | Base |
| Cadillac | Series 62 | 1954 | Base |
| Cadillac | Series 62 | 1955 | Base |
| Cadillac | Series 62 | 1956 | Base |
| Cadillac | Series 62 | 1957 | Base |
| Cadillac | Series 62 | 1958 | Base |
| Cadillac | Series 62 | 1959 | Base |
| Cadillac | Series 62 | 1960 | Base |
| Cadillac | Series 62 | 1961 | Base |
| Cadillac | Series 62 | 1962 | Base |
| Cadillac | Series 62 | 1963 | Base |
| Cadillac | Series 62 | 1964 | Base |
| Cadillac | Series 70 Fleetwood Eldorado | 1958 | Base |
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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