Airaid 400 633 PowerAid Throttle Spacer Review

Hard to tell what the difference is on my 2010 F-150 XLT 4.6L. Maybe something better draws in the mid-range. otherwise the product is well made.

Waste of money Installed according to tech support instructions and checks and my mileage is worse. I don't get any performance gain either. save your money

Installation of the throttle body gasket took less than 15 minutes. The instructions provided were detailed and accurate. It's always very helpful. At the same time I installed a K&N performance intake and am now enjoying the increase in low to midrange torque from the throttle body spacer and the increase in horsepower from the intake system. The increase in power is noticeable when I step on the pedal and let the engine rev over 4000 rpm. When the engine revs up, a deep guttural sound is…

I bought this in addition to a K&N air intake and Flowmaster Delta 50. I did the same setup (no Flowmaster) on my last car (2009 Jeep Wrangler) and had good results. . When I added these items to my 'new Ford' I was pleasantly surprised at the improvement. "Whistle" is almost gone, but there is power. The low torque generated by the spacer and the high suction power are a perfect match for the Flowmaster. The truck sounds powerful but not mean, and I saw fuel economy increase from 14.8 to 17mpg