Reviewed By Dean B (CASTAIC, CA) Reviewed for a 2006 Toyota Tacoma —1/2/2014 10:18 AM
- I noticed a slight improvement with MPG. No more than 1 mpg though. I'm not very impressed with MPG claims. Eh...is my response. - The exhaust is completely odor free from any typical smells from combustion. Before I put it on, I could smell the normal gaseous burning smells, and after, I cannot. This I was absolutely shocked about. I think every car should have one of these, just to help clean the air. - It idles slightly smoother.