Iridium Tip Spark Plug; 4 Pack; Plug Type 15IR4; [Available While Supplies Last];
MSD iridium spark plugs will fire up your engine for optimum performance. These plugs have been engineered from the inside out for efficient combustion to create the most power possible for your setup. MSD's proprietary design features center tips made from iridium--a super hard material that promotes the best spark as well as increased resilience. They also feature copper center cores, special ceramic material to enhance the dielectric strength of the plug housing, and machine-ground straps enhanced with Yttrium to handle the heat of your high horsepower ignition. On the street, at the track, or up and over the trails, MSD iridium spark plugs will outperform and outlive the competition.
- Proprietary Ceramic Formula
- Unique Insulator Design
- Yttrium Copper Core
- Machined Electrode
- 1mm Iridium Tip
- Outlast Performance Plugs
- Improves Comprehensive Drivability And Economy
- Superior Design
Application Summary:
| Year |
Make/Model |
| 1958-1962 |
American Motors American |
| 1964-1965 |
American Motors American |
| 1961-1965 |
American Motors Classic |
| 1961-1962 |
American Motors Custom |
| 1961-1962 |
American Motors Deluxe |
| 1965-1966 |
American Motors Marlin |
| 1959-1960 |
American Motors Rambler |
| 1959 |
American Motors Rebel |
| 1961-1962 |
American Motors Super Six |
| 1954 |
Mercury Custom |
| 1946-1949 |
Mercury Mercury |
| 1954 |
Mercury Monterey |
| 1957 |
Pontiac Bonneville |
| 1950-1958 |
Pontiac Catalina |
| 1949-1958 |
Pontiac Chieftain |
| 1954-1958 |
Pontiac Star Chief |
| 1958 |
Pontiac Strato-Chief |
| 1946-1952 |
Pontiac Streamliner |
| 1957-1958 |
Pontiac Super Chief |
| 1946-1948 |
Pontiac Torpedo |
