My father was getting amazing gas mileage with just the Volant intake. But after adding the spacer, it made a tremendous difference. Anyone that drives a Toyota with the 5.7. Knows how much of a gas hog it is. Normally on a good day 10/11 mpg. But after adding the spacer and the volant intake, I'm averaging 14/15.5 mpg per tank! And that's a huge difference on these trucks. I would highly recommend this to anyone with a Toyota 5.7.
Pretty good see a slight change in response on my tundra easy to install in minutes. Would recommend
I wanted to clean throttle body so I ordered the spacer to install at cleaning time. Easy to instal. Fits perfect. Engine sounds the same. No codes. Have only drove 1 full tank but appears to have increased MPG by about 2 miles per gallon. Looking forward to see results with trailer in tow. Read that dyno tests show MPG/HP improvements also, so Im sold, installed and happy with my 1st results. Also. Throttle body was dirty and definitely needed cleaned at 107K miles.