Review on K&N Cold Air Intake Kit for 2001-2007 Chevy/GMC Heavy Duty 6.0L V8 (Silverado 2500, Silverado 3500, Sierra 2500, Sierra 3500), 57-3031-1 - Enhanced Performance and Increased Horsepower by Alex Ferry
Increased MPG - Replacement Parts
Increase 1/2 Mpg. According to the specs, that was all it needed to give, so it's working as expected. I used to get 14 mpg on my 2006 Chevy 2500 6.0 liter (265,000 miles). Get 14.5mpg now, wow! In the end it will pay off. Read the installation instructions. I had to make some adjustments to get a tight fit. It fell off the first day I walked with it, no problems since.
- HIGH QUALITY: Made in America.
- You could choose a newer model
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