10 Best Spark Plugs 2025 in the United States

The NGK # 3186 G-Power Platinum Spark Plugs TR5GP is a robust choice for those looking for reliable performance in their vehicle’s ignition system. Made primarily from platinum, these spark plugs offer durability and longevity, making them a cost-effective option in the long run.

One of the standout features is its ability to operate over a much wider heat range than ordinary plugs, which is beneficial for maintaining consistent performance across various driving conditions. Additionally, the design helps to resist carbon buildup and prevent pre-ignition, which can prolong the life of the spark plug and improve engine efficiency. The patented triple gasket sealing process is another highlight, ensuring that there is no combustion gas leakage, which can be crucial for maintaining engine integrity and performance.

With a thread size of 14x1.25mm, these spark plugs should fit a wide range of vehicles, but it’s always best to double-check compatibility with your specific make and model. The NGK # 3186 G-Power Platinum Spark Plugs rank highly in the automotive replacement spark plug category, indicating strong market acceptance and trust in the product's quality.

The 8 ACD-OEM Double Platinum Spark Plugs and Wires Set for LS2, LS3, LS4, LS7 Engines offers several strengths. The double platinum point pads on the center and ground electrodes ensure excellent durability and consistent voltage demands, which can extend the lifespan of your ignition system. Additionally, the pure copper core helps in maintaining a cooler electrode temperature, enhancing durability and reducing fouling.

The set includes heat shields, which can be beneficial in protecting the plugs and wires from engine heat, potentially prolonging their life and performance. The spark plug distributor boot shape and materials are designed for a proper fit and water-tight seal, ensuring efficient performance similar to the original GM components.

The product is highly rated with a 4.6 out of 5 stars from 691 customer reviews, indicating general satisfaction. The item is also ranked well in the automotive replacement spark plugs category, suggesting it’s a popular choice among consumers. This product is ideal for car owners looking for reliable spark plugs and wires that match OEM standards, especially for those with LS2, LS3, LS4, or LS7 engines.

The NGK LKAR7BIX-11S Iridium IX Spark Plug is an excellent choice for performance enthusiasts looking to maximize their engine's potential. Made from high-quality iridium, this spark plug is designed to offer extreme ignitability and improved throttle response. Its 0.6 millimeter laser-welded fine tip ensures high durability and a consistently stable spark, making it ideal for high-performance engines. The tapered ground electrode helps minimize the electrical quenching effect, which further enhances performance and efficiency.

Additionally, the longer insulator nose and corrugated ribs help prevent fouling and flashover, while the triple gasket seal eliminates combustion gas leakage. The trivalent metal plating provides superior anti-corrosion and anti-seizing properties, ensuring the spark plug lasts longer even under harsh conditions. However, it is specifically designed for UTVs, so it may not be suitable for all vehicle types. The thread size is M14 x 1.25, which is standard and should fit most compatible engines.

Customer reviews are highly favorable, with a 4.6 out of 5-star rating from over 2,300 ratings, indicating strong user satisfaction. This spark plug is ideal for those who require reliable performance, durability, and enhanced engine efficiency.