🚀 Airaid PowerAid Throttle Body Spacer 400-531 for Improved Engine Performance and Efficiency Review

just fitted 27.08.2016. What I noticed from behind is a whistle, which doesn't bother me at all. I like the elegant look. I installed it on my 5.4L F-150 Harley-Davidson engine with Roush CAI and will provide an update report in a few months.

5.4 F150 Supercrew 👌 Feel more troll responsiveness just by lightly stepping on the pedal. As for mileage or horsepower, I don't even know jejeje. And the whistle isn't even loud like others say, I can barely hear it. I recommend this product and this store, fast shipping and no hassle! .

Very easy installation. Everything you need is included. I did notice an improvement in throttle response, but nothing significant. Sometimes a very faint whistle, but I have to turn off the AC, turn off the radio, and roll down the window to hear it. Installed on a 2010 Ford F-150 5.4 with K&N cold air intake.

I was skeptical about the price and location of this item but it was actually very easy to install. The included hardware and instructions are key to how easy the project was. I hear a high-pitched hiss when I step on the gas. I'll see how this plays out on MPG in the coming weeks.

Recently installed this spacer and yes, installed it correctly. I have no whistling at all and NO DIFFERENCE in terms of throttle response, power increase etc. COMPLETE WASTE OF MONEY! I think those who said they saw improvement must feel guilty or embarrassed for spending over $145 on this red thing that does NOTHING! NOT RECOMMENDED!

I have a 2007 Expedition and bought it hoping it would reduce the slight engine chatter at low rpm. (starting with a full stop and new Autobahn shifts) My engine performance has improved. In low-rpm situations, it is "snappy". It's too early to tell if this will help with fuel economy, but logically it would make sense, I use less throttle to get to the same city speed as before. However, to be honest, it may be a while before I see a bonus on gas mileage. 'because it's too much fun to play…