Description
The Mishimoto MMAI-STI-08P Performance Air Intake replaces the restrictive factory airbox on the 2008-2014 Subaru WRX and STI with a mandrel-bent aluminum intake pipe finished in polished aluminum. Engineered and dyno-tested by Mishimoto, this cold air intake is built to work with the factory tune while adding measurable power without sacrificing safe air/fuel ratios.
This performance air intake system pairs a CNC-machined mass airflow sensor housing with a Mishimoto air straightener to keep MAF readings accurate and consistent, resulting in a smooth, predictable power band rather than a jumpy one. Positioning the air filter outside the engine bay, combined with a powder-coated heat shield, keeps intake air temperatures down for a true cold air intake design. The Mishimoto free-flowing air filter offers 16-percent greater surface area than the factory filter for improved airflow and thorough filtration, and because it’s an oiled, serviceable air intake filter, it can be cleaned and re-oiled for continued use rather than replaced. On the dyno, this intake produced gains of 25 hp and 25 tq at 5300 rpm over the OEM intake, all while installing in under one hour with the included coupler, clamps, and hardware.
Vehicle Applications
This Mishimoto cold air intake is a direct fit for the 2008-2014 Subaru Impreza WRX (including WRX GT for 2010, WRX Limited from 2010-2014, WRX Premium from 2009-2014, and WRX SE for 2010) as well as the 2008-2014 Subaru Impreza WRX STI (including STI Limited from 2011-2014 and the 2010 STI Special Edition). It also fits the later Subaru WRX Base (2012-2014), WRX Limited (2013-2014), and WRX SE (2014), along with the Subaru WRX STI (2012-2014), WRX STI Base (2013-2014), WRX STI Sport-tech (2013-2014), and the 2014 WRX STI Tsurugi Edition. Additionally, this intake covers the Subaru Forester XT for 2009, Forester XT Limited (2009-2010, 2012-2013), Forester XT Premium (2010-2013), Forester XT Sports (2010-2012), and Forester XT Touring (2011-2013). It is designed around the EJ255 and EJ257 engine codes and GE, GH, and GR chassis codes.
Features
- Direct fit for the 2008-2014 Subaru WRX/STI
- Dyno-proven gains of 25 hp/25 tq at 5300 rpm
- Eliminates restrictions and improves airflow
- Mandrel-bent aluminum intake pipe with air straightener and CNC-machined MAF housing
- Powder-coated heat shield for optimal air temperatures
- Mishimoto free-flowing air filter provides 16-percent greater filter surface area
- True cold air intake design with filter placement outside the engine bay
- Fully serviceable oiled air intake filter
- Provides an aggressive, rich intake tone
- Bolt-on performance works with stock tune and installs in under one hour
- Designed in Delaware, USA, with a filter made in the USA
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Filter Material: Multi-layered cotton
- Filter Color: Red
- Filter Diameter: 2.75 inches
- Air Filter Part Number: MMAF-2757
- Hose/Pipe Material: Aluminum
- Hose Finish: Polished
- Grade Type: Performance
- CARB EO Number: D-759-3
- Engine Codes: EJ255, EJ257
- Chassis Codes: GE, GH, GR
- Includes: Aluminum intake pipe, high-flow oiled filter, heat shield with protective edging, silicone coupler, rubber mounting isolator, hardware, and Mishimoto Lifetime Warranty
Frequently Asked Questions
What horsepower gains does this cold air intake provide?
Dyno testing showed gains of 25 hp and 25 tq at 5300 rpm over the OEM intake.
Which vehicles does this air intake fit?
It fits the 2008-2014 Subaru Impreza WRX and WRX STI, the 2012-2014 Subaru WRX and WRX STI (including Base, Limited, SE, Sport-tech, and Tsurugi Edition trims through 2014), and the 2009-2013 Subaru Forester XT (including Limited, Premium, Sports, and Touring trims within that range).
Do I need to retune my vehicle after installing this intake?
No, the intake is designed to work with the factory tune.
How long does installation take?
Installation takes under one hour and includes all necessary hardware, a silicone coupler, and clamps.
What is the air filter made of, and is it serviceable?
The filter uses multi-layered cotton and is oiled, offering 16-percent greater surface area than the factory filter; it is fully serviceable for repeated cleaning and re-oiling.
What finish options are available for the intake pipe?
The mandrel-bent aluminum intake pipe is available in a red or black powder-coated finish or a polished aluminum finish.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
