Reviewed By Michael Z (Lido Beach, NY) Reviewed for a 2013 Nissan Altima —1/24/2015 8:24 PM
I actually notice the increase in horsepower, the sound is pretty damn awesome, probably the best single upgrade for a car.
Reviewed By Darryl M (KNOXVILLE, TN) Reviewed for a 2007 Nissan Versa —1/22/2015 6:51 AM
My only upgrade to date. It's not huge, but I can feel it. It's really easy to install and all you need is a couple of screwdrivers. Don't know about mpg benefits yet, but it did make a difference in the 3 - 4000 rpm range especially.