Reviewed By greg f (Camarillo, CA) Reviewed for a 2000 Jeep Grand Cherokee —11/14/2007 10:05 AM
huge increase in high end torque, whistle sounds like a supercharger, increase in 1-2 mpg
Reviewed By Marcos E (CHICAGO, IL) Reviewed for a 2015 Jeep Grand Cherokee —4/15/2016 7:50 AM
This was easy to instal and you can see a difference if you drive a car that reads your miles per gallon, it did boost me up about 3 miles to the gallon. I didn't feel much of a power change but i do hear the whistle like a turbine once in a while depending how your gears change. I definitely would had not paid more than $30 for the other ones since you cant tell the difference dramatically but worth $30 for sure to instal as easy as it was.