• Unleash Power: Replace your factory air filter and intake housing to gain significant horsepower and torque. • Exceptional Filtration: The oversized AEM Dryflow synthetic washable air filter ensures outstanding air flow and filtration, lasting up to 100,000 miles. • Easy Installation: Install with common tools and enjoy AEM's Lifetime Limited Warranty. The AEM 21 - 836WR Performance Cold Air Intake System is specifically designed, tuned, and dyno - tested for 2018 Subaru WRX STI models. Air enters through the high - performance air filter in the original air box space, protected by a heat shield to reduce intake air temperature and boost horsepower. The mandrel - bent aluminum intake tubing has a durable textured red powder - coated finish. It's compatible with the engine's factory emissions control devices. Note that some AEM air intakes have different legal statuses, so check the 21 - 836WR vehicle applications. This part fits 2018 Subaru WRX STI Base, Limited, and Type RA models.

Use this cold air intake system when you want to enhance your 2018 Subaru WRX STI's performance, whether it's for daily driving or weekend races. It's perfect for Subaru enthusiasts who want an easy - to - install upgrade. The system features an oversized AEM Dryflow air filter that fits in the original air box space and a mandrel - bent aluminum intake tubing with a red powder - coated finish.