The BOSCH OE Iridium Spark Plug 4PCS is a set of high-quality spark plugs designed specifically for vehicles made between 1984 and 2001 by Buick, GMC, Chevrolet, and Pontiac. With a warranty of 1 year, these spark plugs are manufactured by Bosch, a trusted brand known for producing reliable automotive parts. The iridium design ensures longer-lasting performance and improved efficiency, making them an ideal choice for vehicle maintenance and repair. This product comes with 8 pieces, making it a convenient and durable option for a range of vehicles.