Champion Copper Plus- Boxed - RJ14YC, 63

Champion copper plus- boxed - rj14ycdependable performance. this champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.built to iso and sae standards for proven performancesuperior corrosion resistancecopper core center electrode allows for accurate control of heat range for longer lifecopper plus - dependable performance and durabilitychampion copper plus 63 spark plug (carton of 4) application summary:buick pass. car: 3.7l v6 (67-67), 4.9l v8 (66-66), 5.2l l8 (49-46), 5.3l v8 (56-54), 5.6l v8 (67-67), 6.0l v8 (58-57); cadillac pass. car: 5.4l v8 (55-50), 6.0l v8 (58-56), 6.4l v8 (62-59); checker pass. car: 4.6l v8 (67-64); chevrolet pass. car: 4.6l v8