Ignition Projects Quad Spark Ignition Coil Set 06-10 WRX / 04-10 STI / 05-09 Legacy / 04-10 Forester

Upgrade your Subaru’s ignition system with the Ignition Projects Quad Spark Ignition Coil Set, designed specifically for 2006-2010 WRX, 2004-2010 Subaru WRX STI, 2005-2009 Legacy GT, and 2004-2010 Forester models. This premium coil set delivers enhanced throttle response and improved drivability by producing powerful quad sparks at low to mid RPMs, boosting ignition power by 46%.

Featuring advanced Quad-spark technology, these coils generate secondary voltage without needing an external discharge box, creating strong sparks in just 1/1000 of a second up to 3000 RPM. Above this range, the coil switches to a high-performance single spark mode, ideal for tuned engines. Installation is simple with direct plug-and-play compatibility—no cutting or splicing required.

Perfect for Subaru enthusiasts seeking reliable performance upgrades, this coil set stabilizes idle, reduces misfires, and improves starting reliability. Whether you’re upgrading your daily driver or tuning your Subaru for better performance, the Ignition Projects Quad Spark Coil Set offers a trusted solution. Shop now at Subimods for quality Subaru ignition parts designed to enhance your driving experience.