Lake Michigan Chartbook + Cruising Guide, 9th Ed. Includes: Green Bay, Lake Charlevoix and the Straits of Mackinac. • 12" x 18" • Spiral Bound • Cruising Information • Marine Facilities • Aerial Harbor Photographs • GPS Waypoint Labels • Navigational Reference Data

NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This tapered cut iridium center electrode reduces the voltage requirement for spark. This