![]() When considering the best spark plugs for your vehicle, consult your owner’s manual for manufacturer recommendations on brands and replacement practices. There are few negative reviews of this product, including some that say the plugs didn’t match their engine. Many reviews commend the ease of installation of these plugs, with good remarks about the reliability of the spark plug wires, as well. Key FeaturesĪmazon reviews for this product package are positive, with an average of 4.7 out of 5 stars. Notable specifications include a one-piece suppressor that creates a gas-tight seal great for reducing radio frequency and engine interference, as well as a pure copper core built for maximum fouling resistance. Although this brings the price of the package up, including these wires helps reduce the cost of buying them separately. Included in this listing is a set of Herlux spark plug wires, which help conduct power from the spark plugs. Negative reviews are scarce, with one review citing poorer engine performance after replacing the spark plugs.ĪC Delco has been producing parts for General Motors for over a hundred years, and this dedication to quality is demonstrated by its ACD-OEM 41-962 spark plugs. Many positive reviews come from owners of the car brands advertised as compatible with the spark plugs. Key FeaturesĬustomer reviews for the HiVehicle spark plugs on Amazon are positive, with an average of 4.5 out of 5 stars. One drawback to these spark plugs is that they are only compatible with select car brands: Chevrolet, GMC, Cadillac, Buick, Hummer, Oldsmobile, and Pontiac, making these spark plugs a limited option for other car owners. HiVehicle also claims that its plugs improve fuel efficiency and emissions, as well. The 99-percent copper-clad electrode makes the plug great for conductivity, reducing the risk of false starts and breaking while working. HiVehicle New Iridium spark plugs are great for drivers who want high durability and a consistently stable spark. These can serve as a gentle reminder that new spark plugs should be the same, if not similar, model as what your vehicle was originally equipped with. Negative reviews complain that the Denso spark plugs do not fit their engine. Many reviewers note increased engine performance and better gas mileage after installing the Denso iridium plugs. 0.4-mm iridium-tipped laser-wired fine wire center electrodeĪmazon reviews for these spark plugs are positive, with an average rating of 4.7 out of 5 stars.Its five rib insulator also helps prevent flashover, and the copper-glass seal bonds the electrode and insulator to provide a gas-tight seal. This plug’s tapered-cut U-groove ground electrode increases ignitability and decreases quenching. The only real con is the price, which is higher than most of its competitors. It is one of the best iridium spark plugs on the market. The Denso #5304 Iridium Power spark plug is great for improving firing performance in your engine. One complaint is that some customers needed to have the gap adjusted slightly on their plugs to make them fit their vehicles, yet many of these reviews were still ranked at 4.5 stars or above. Key FeaturesĪmazon reviews for the NGK Iridium IX spark plugs are largely positive, with an average of 4.7 out of 5 stars. Other notable features include a fine iridium tip and trivalent metal plating, both of which contribute to better fuel economy, superior corrosion resistance, and a consistently stable spark for better starts. ![]() One of the key features of the plug is its high melting point, making the plug more suitable for engines that are generally in a greater heat range than most vehicles. Although they are more expensive than other spark plugs, their longevity and ease of use are tough to beat. If you’re searching for optimum performance for your vehicle, look no further than the NGK Iridium IX spark plugs.
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