Reviewed By Miron H (COHOES, NY) Reviewed for a
—7/16/2014 9:30 AM
This filter was designed for the WRX STi, but it works just fine in my standard Forester. As promised, the engine breathes a little easier, shifts a little smoother, and shows power gains at RPMs >3,000. However-and this was important to me-the filter does not change the engine sound, shift O2 levels too far outside factory specs (which can mess with your computer), and appears to be a safe, high-quality filter. Very satisfied so far!