Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.
- Triple gasket sealing process eliminates gas leakage past the shell
- 99% Highly pure alumina silicate insulator
- Solid copper core
- Corrugated ribs to prevent flash over
- Cold rolled threads to prevent damage to cylinder head
- Trivalent plating - silver chromate and zinc for corrosion resistance
- Sold in standard packs only
| Brand | NGK Spark Plugs |
| _Pack | 10, 10 |
| _Mfg # | 5728, 5728 |
| _Model # | BMR4A, BMR4A |
| _Pkg. | Boxed, Boxed |