Reviewed By John I (Grasonville, MD) Reviewed for a 2010 Ford Focus —11/10/2011 8:16 AM
I received the filter on time and I was able to install it with ease. On the 1st tank of gas I had 2MPG improvement. I continue to average 2 to 4 MPG better.
Reviewed By Matthew L (Oxnard, CA) Reviewed for a 2013 Ford Focus —3/12/2015 9:29 PM
The boost-dump sound is why most people will be picking this over a K&N or similar filter, so I'll say its definitely a good sound. I was worried about it being too loud and ricey, competing with my Borla Exhaust for attention, but it doesn't. That said, the induction sound is also louder, so if you're not a fan of louder whistling on acceleration, this may not be a good call. That boost-vent though...