Amazing!! I have had 2 of them installed on two vehicles. First was my 2015 Chevy Silverado. He was able to improve my gas mileage by about 3-4 mpg on avg.
I was VERY pleased with the results!!
My second vehicle is an 2008 Infinity EX35 car and vastly improved mpg with the AC on and in city driving!
It's running about 23-24 in the city and 26 highway.
I am absolutely grateful that God has blessed him with this amazing gift!
2008 Infinity

I was thinking of buying a new car, but not now!! TBCustum basically gave me a new car! More power! Better MPG!! Genius!
2012 Chevrolet Impala

Well the first 60 miles showed MPG improvment from 27 to 32. I had to get used to lower RPM's while having the same power. I was impressed with how fast the results showed up. Thank you TBCustum!!
2017 Honda CRV

I used to get 289 miles per 13 gallon tank. Now I get 406!!!
2008 - Pontiac Solstice

TBCustum made some adjustments to my car and now I got a 50% increase in gas mileage! Massive improvement in acceleration!
2000 Toyota Corolla

My car was 24 - 27 MPG before TBCustum - After TBCustum it is now 32 MPG and more power!!
2000 Toyota MR2 Spyder

I am pleased to announce that my Honda Pilot is now getting 5 MPG MORE since TB Custum!! Thank you TBCustum!!
2019 Honda Pilot