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Airaid PowerAid Throttle Body Spacer Part #400-591 Customer Reviews
21 Customer Reviews
Reviewed by John B (Trimont, MN) Reviewed for a 2002 Ford F-150 — Aug 10, 2014 10:38 AM
I installed on a F-150 with 68,000 miles. I was expecting a fuel economy increase. It may have improved performance, but not economy. Still 16 to 16 1/2 MPG very disappointed. I also made a change to my air intake, with a k&M filter. Still little or no improvement. SO now I am looking to change exhaust and install a 12 volt fan. maybe 16+ is then best I can expect.
Reviewed by Trey H (Prairieville, LA) Reviewed for a 1999 Ford F-150 — Jun 18, 2009 11:40 PM
After installing the spacer on my truck i didnt notice a huge increase in power but there was a slight increase but my gas mileage really boosted!
Reviewed by Joshua W (Albuquerque, NM) Reviewed for a 1998 Ford Expedition — Oct 25, 2007 10:04 AM
I have a 98 Ford Exedition with 9" of lift and 37" tires. I have done several things to it to include the Fram Boost Cool Air Intake, Edge Performance Chip, Flowmaster Exhaust, and much more... When I put the Airaid throttle body spacer on I really noticed a difference in the mid-range power and yes I have noticed an increase in mileage. And with 37" tires any increase in mileage is great!!! The sound the whistle makes isn't as loud or as annoying as I thought it was going to be. I kinda wish it was a little louder whistle. But awesome product. Highly recommended!!!
Reviewed by Alex W (Jacksonville, FL) Reviewed for a 1999 Ford F150 — Oct 13, 2007 7:50 AM
well i gotta say it wasnt that bad to install...as long as u got the tools u can do it....well...i notice the whistle it sound like 1/6 of a turbocharger....but same sound like...no noticable power increase or fuel economy...so im not sure what to say....i here the whistle so i know its working maybe i just ride it hard....overall good product would buy again!!
Reviewed by Jordan S (Soldiers Grove, WI) Reviewed for a 1999 Ford F150 — Jul 23, 2007 9:51 PM
very easy and fast to put in. has a whisle that i think is cool and you can tell when its working 2700rpm to about 4500 a bit more mid and top end power
Reviewed by Joseph G (Ridgecrest, CA) Reviewed for a 2007 Lincoln Mark LT — Jun 25, 2007 11:35 PM
Very nice item... easy to install. and im getting about 2 miles to a gal better on the highway but not much of a change in the city... last it has a nice whistle.. A+++
Reviewed by damien a (Santa Rosa, CA) Reviewed for a 1999 Ford Expedition — May 03, 2007 5:35 PM
Not bad for for the price.I noticed a little improvement in performance and gas mileage.I like the whistle sound,its not that bad.Good buy
Reviewed by nicholas z (Clovis, NM) Reviewed for a 2002 Ford F150 — Apr 20, 2007 7:02 AM
I really didn't notice a whole lot of difference in performance or fuel economy. There was a slight difference but not substatial at all.
Reviewed by scott l (North Providence, RI) Reviewed for a 2003 Ford Expedition — Apr 10, 2007 7:40 AM
Very easy installation, not sure if I can notice any power gains. The whistling is a little annoying, Kinda sounds like a slipping belt.
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