Reviewed By Erik G (Bozeman, MT) Reviewed for a 2002 Chevy Astro —1/5/2017 5:47 PM
Time will tell if they last.
Reviewed By Devin L (STOCKTON, CA) Reviewed for a 2007 Chevy Silverado —2/22/2016 9:17 AM
A great product does exactly what it promises. An almost two mile per gallon improvement and the truck runs noticeably better. Definitely NOT A SNAKE OIL! What sold me was that this unit was Police tested and used, and they were right! I am putting two more on all of my vehicles.