Iridium Spark Plug

The ACDelco 41-110 Iridium Spark Plug is a professional-grade replacement designed to be an exact match for your vehicle's original components. Leveraging the latest in spark plug technology, this plug utilizes an iridium composition, offering a high melting point, superior strength, and exceptional wear resistance and durability for long-lasting performance. Its design is manufactured to meet ACDelco's standards for fit, form, and function. Key specifications include a 14mm thread size with a 1.25mm pitch, a tapered seat type, and a 17.50mm reach. The spark plug is a resistor type, with a value between 4-7.5K Ohm. It features a 5/8" (16mm) hex size and an insulator height of 0.98" (25mm). The pre-set gap is .040". The center electrode is made of copper, while the ground electrode is constructed from nickel with a single prong and a tapered cut shape. This spark plug is sold individually and has a heat range of 4. While ACDelco is known for quality, some sources suggest the 41-110 may no longer be recommended or manufactured by ACDelco, with one forum mentioning it is an NGK plug. Fitment information varies, with some sources indicating compatibility with 2000-2013 Chevy Silverado, Suburban, Avalanche, Express, GMC Cadillac Escalade, Yukon, Sierra, and Savana models with 5.3L, 6.0L, and 6.2L V8 LS engines. Other sources list fitment for Chevrolet Cruze (2011-2015), Express (2015), Express 1500 (2011-2015), and Express 2500 (2010-2018). Compatibility may extend to older Chevrolet and GMC vehicles from the 1980s and 1990s. It's advisable to verify exact fitment for your specific application.