This Perrin cold air intake system is a perfect fit for 2008 - 2014 Subaru WRX and 2008 - 2015 Subaru STI models. It holds CARB EO # D - 735. The intake system features proper MAF alignment and ideal plumbing size, which are vital for maintaining the right air - fuel ratios and avoiding check engine lights. The CNC - machined MAF sensor bung ensures a perfect fit and alignment of the MAF sensor to the intake. This is key for accurate air - fuel ratios and ECU engine management. The Dryflow Filter offers the same protection as an oiled filter, but it's easier to maintain, cleaner, and has no over - oiling risk. The rigid screen inside and around the filter media protects it from debris, making it great for dusty and rough driving. The intake has CNC mandrel - bent aluminum tubing powder - coated in eye - catching hyper pink. It provides smooth and predictable airflow, leading to consistent MAF sensor readings and reliable horsepower gains. It boosts horsepower, torque, and improves throttle response. No tuning is required, and it takes about an hour for intermediate - level installation. There's a 5 - year manufacturer warranty. The package includes a PERRIN cold air intake tube, a PERRIN dry intake filter, a PERRIN intake mounting bracket, a PERRIN license plate frame, all necessary installation hardware, and warranty & install instructions. Note that actual horsepower may vary based on other installed hardware, tunes, and your vehicle's overall condition.

Using this Perrin cold air intake is simple. First, make sure your vehicle is turned off and cooled down. Follow the included install instructions to mount the intake tube, filter, and bracket using the provided hardware. It's an intermediate - level installation that should take about an hour. Once installed, your car is ready to go. You'll notice improved throttle response and more power right away. When it comes to maintenance, the Dryflow Filter is a great feature. It needs less upkeep compared to oiled filters. You can periodically check the filter for debris. If it's dirty, you can clean it according to the instructions. Just be careful not to damage the rigid screen inside and around the filter media. Remember, the actual horsepower gain can vary depending on other parts in your vehicle and how well - maintained it is. Also, keep the warranty papers safe as this product comes with a 5 - year manufacturer warranty.