ACDelco MR43T Copper Spark Plug - 4 Pack - For Mercruiser 305 350 454 5.0L 5.7L

ACDelco Specialty Marine Spark Plugs are everyday replacement plugs designed for reliability and efficient performance in jet boats, inboards, outboards, and personal watercraft. They can maintain stable operating temperatures under varying loads. Their high-quality copper core and outstanding suppression characteristics deliver reliable performance. ; ACDelco Gold (Professional) Marine Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These Marine Spark Plugs are everyday replacement plugs designed for reliability and efficient performance in jet boats, inboards, outboards, and personal watercraft. They can maintain stable operating temperatures under varying loads. Their high-quality copper core and outstanding suppression characteristics deliver reliable performance. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.

Product Features:

Copper core provides great heat transfer and helps maximize plug durability

Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires

Nickel-chrome alloy sheathing to help prevent corrosion on center electrode

Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Available for use in Marine applications

Premium aftermarket replacement part

ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models