NGK Iridium IX Spark Plug Set Stock Heat 2006-2014 WRX / 2004-2021 STI / 2005-2009 Legacy GT / 2004-2008 Forester XT

Upgrade your Subaru’s ignition system with the NGK Iridium IX Spark Plug Set, engineered for high-performance Subaru WRX, WRX STI, Forester XT, and Legacy GT models from 2004 to 2021. These premium spark plugs deliver superior ignitability and throttle response, helping your engine run smoother and more efficiently for an enhanced driving experience.

Featuring a fine iridium tip, the NGK Iridium IX plugs offer exceptional durability and a consistently stable spark, ideal for demanding Subaru engines. The iridium alloy withstands extreme heat, while trivalent metal plating prevents corrosion and seizing, ensuring long-lasting reliability. Sold as a set of four, these plugs improve acceleration and fuel efficiency, making them a smart upgrade for enthusiasts seeking OEM-quality replacement parts.

Perfect for Subaru owners who want to maintain or boost engine performance, this spark plug set is a reliable choice for stock heat applications. Trust Subimods for specialized Subaru parts and accessories. Upgrade your ignition system today and feel the difference on every drive.