Reviewed By Robert G (San Leandro, CA) Reviewed for a 2011 Mazda 3 —11/8/2016 9:04 AM
This is one of the easiest upgrade you can do for your car. Installation was so easy even a caveman can do it. ;-). Seriously, it feels and sounds like the car is able to "breathe"easier now. Can't say anything about the performance boost others claim but my horse seems to be running smoother.