- Cold-rolled threads of the NGK Marine Spark Plugs help prevent spark plugs from seizing, even in aluminum heads or salt water conditions
- Double-dipped zinc chromate coated metal shell is corrosion resistance – even in harsh salt water environments
- OE on many major marine engine manufacturers
- Includes 2 spark plugs per package
v2355,v170749,v2354,v170748,v2353,v170747
