NGK Laser Iridium Spark Plug Box of 4 (IZFR5G) 1984-mazda-rx-7-esi3117150 This is specifically designed to

This is specifically designed to be used on an LT4 Supercharger

creating an increase in throttle responsiveness that will make your car feel like a whole new machine

that ca n be set separately and independently of each other

drop for 1967-1969 Camaro and Firebird Coupes with Small Block motors

5 4X100 ET45 Titanium Metallic Knurled Bead Flow Formed

NGK Laser Iridium Spark Plug Box of 4 (IZFR5G) 1984-mazda-rx-7-esi3117150 This is specifically designed toNGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts.