Not sure which 1999 Chevy Silverado Throttle Body Spacers are right for you? We have over 1486 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I've had the throttle body spacer on for one tank of gas. So far my gas mileage improved from 15 to 17 mpg. And my horsepower went up too. by how much i dont know but it is very noticable." —Jeff L from Clayton, IL bought a Jet Power-Flow TBI Spacer for a 1999 Chevy Silverado.
"My gas mileage has increased 3 miles per gallon. Notable increase in engine performance." —Troy H from Morristown, TN bought a Taylor Cable Helix Power Tower Throttle Body Spacer for a 1999 Chevy Silverado, 4.6L V8.
"Before i purchased the poweraid ,I had read the pros and cons. some good some bad. So I bought it. Love it. I was getting 17.3 miles to the gal. Thats on the hwy. In town 15.8 Now Im getting 19.1 hwy and 16.9 in town. Great throttle response.I drive a 1999 chevy ext. cab 4x4 with a 5.3. It really woke it up.
Thanks so much
Ray " —Ray P from Iowa, LA bought an Airaid PowerAid Throttle Body Spacer for a 1999 Chevy Silverado.
"Pretty darn easy to install. A ratchet, a couple sockets, and one hour and you have a well made, well functioning upgrade. The trademark whistle is cool - sounds like a turbo. Already seeing improved gas mileage with the cold air intake it was installed on. Well done Airaid." —Joseph M from Washington, PA bought an Airaid PowerAid Throttle Body Spacer for a 1999 Chevy Silverado.
"It was real easy to install and took about 30mins.Only been on for a week so dont know how much it helps the gas mileage. I can feel more power and faster take off. I even put 1 on my son's truck too." —Keith P from Union City, TN bought an Airaid PowerAid Throttle Body Spacer for a 1999 Chevy Silverado.