• Specifically Designed: These K&N filters are a perfect fit for our ETS 2004 - 2007 Subaru STI Intake Kit. (RE - 0910) • Optimal Replacement: Ideal replacement filters to keep your intake system running smoothly. • High - Quality: Engineered for top - notch performance and long - lasting durability.

This air filter is designed for 2004 - 2007 Subaru STI owners who want to enhance their car's intake performance. It's great for daily driving and occasional track days. The filter is specifically made to fit the ETS intake kit for this specific Subaru model, ensuring a seamless installation and improved air flow.