Best Spark Plugs for AC Delco of 2026

The ACDelco GM Original Equipment 41-162 Iridium Spark Plug features an iridium composition that provides high melting point and great strength, resulting in excellent wear resistance and durability. The spark plug offers reliable cold starting, quick acceleration, smooth performance, and excellent engine idle stability. The three-piece fired in suppressor seal meters spark energy for long electrode life, prevents combustion leakage, and blocks radio frequencies that can affect vehicle electronics. ACDelco GM Original Equipment parts are designed, engineered, and tested to rigorous standards for Chevrolet, Buick, GMC, or Cadillac vehicles.

The ACDelco Professional Platinum Spark Plug offers a one-piece, gas-tight seal and a double platinum point pad that provides consistent voltage demands, prevents wear on the ignition system and protects against compression pressures. With pure copper core, this spark plug can maximize durability and reduce fouling resistance. Formerly known as ACDelco GM Original Equipment parts.

The ACDelco GM Original Equipment 41-109 Iridium Spark Plug offers excellent engine idle stability and smooth performance. The Iridium fine-wire electrode design allows for reliable cold starting and quick acceleration, while helping to burn away carbon deposits on the tip of the plug as they form. The one-piece suppressor seal helps block radio frequencies that can affect vehicle electronics and meters spark energy for long electrode life and combustion prevention. These parts are designed, engineered, and tested to rigorous standards, and are backed by General Motors, with GM regularly updating production and service part designs to integrate new materials and technologies.

The TORCH F7RTC Spark Plug offers a trusted history, originating from a company founded in 1961 and recognized as a leading spark plug producer in China. This spark plug is designed with precise specifications, including a 20.8mm hexagon size and 19mm thread length, ensuring a proper fit for many engines. It is compatible with various popular spark plug models, making it a versatile option for your vehicle. With the TORCH F7RTC, you can expect longer service life, quicker engine starts, reduced emissions, and improved fuel efficiency, making it a practical choice that enhances your vehicle’s overall performance.

The ACDelco GM Original Equipment 41-114 Iridium Spark Plug offers excellent engine idle stability and smooth performance, reliable cold starting and quick acceleration. Its fine-wire electrode helps burn away carbon deposits on the plug's tip, while the one-piece suppressor seal blocks radio frequencies that can affect vehicle electronics. This spark plug is designed, engineered and tested to rigorous standards, ensuring long electrode life and preventing combustion leakage.

The TORCH F6RTC Spark Plug comes from a trusted brand with a long history dating back to 1961, ensuring you get a reliable and well-established product. It is designed with precise specifications like a 14mm thread size and 19mm reach, so you can easily check compatibility with your engine. This spark plug replaces many popular models from brands like NGK, Bosch, and Champion, making it a convenient choice if you need a versatile replacement. Backed by advanced technology acquired from DELPHI USA, this spark plug offers you modern performance and quality to keep your engine running smoothly.

The ACDelco R45TS Spark Plug is a high-quality spark plug designed for Chevrolet, Buick, GMC, and Cadillac vehicles. It features a black onyx coating that helps reduce corrosion, ensuring long-lasting performance. The copper core of this spark plug provides excellent heat transfer, maximizing its durability. With a ribbed suppressor seal, it offers resistance against spark 'flash over' and misfires. Additionally, the nickel-chrome alloy sheathing prevents corrosion on the center electrode. These features combined make the ACDelco R45TS Spark Plug a reliable choice for your vehicle, ensuring efficient ignition and smooth engine performance.

The ACDelco Spark Plug is designed to enhance your engine's performance. With compact dimensions of 3.50L x 0.91W x 0.75H inches, it fits easily into various engine models, making installation straightforward for you. Weighing only 0.07 pounds, it is lightweight, which can contribute to better fuel efficiency. Sold as a single unit, this spark plug is convenient for those who need a quick replacement without having to buy in bulk. Overall, this product is a reliable choice for maintaining your vehicle’s engine efficiency.

The TORCH F6RTC Spark Plug comes from a brand with a long history, established in 1961 and recognized as China’s largest spark plug manufacturer. This means you can trust its experience and quality in ignition parts. The spark plug’s specifications, including a thread size of M14*1.25MM and a 19MM thread reach, ensure it fits correctly for your engine, giving you confidence in compatibility. It also replaces many well-known spark plug models from brands like NGK, Bosch, Champion, and Denso, making it a versatile choice. Plus, the advanced technology from Delphi USA used in production ensures reliable performance for your vehicle or equipment.