This product did make a notable reduction in sound at idle and seemed like the truck didnt vibrate as much. Install was simple however I did it with the valley fully exposed, I would recommend at least taking the intake manifold off and using a line wrench. The fittings are well made and o-rings are the correct size, however a torque spec would be nice to have.

If you can do one improvement on your 7.3, this is it. Made a significant difference in engine clacking and smoothed out idle and running down the road. Simple install. Great product.

Fitament and function were excellant.

Highly recommend this product. its a cheap mod that definitely improves fuel mileage and a little bit of power. very satisfied!

Easy installation, i don't know why Ford didn't make this a factory item.

Quality of part was excellent. Installation was a breeze. Limited disassembly required to install the HPX. I didn't see significant difference in idle quality. Overall, I do believe this will benefit the performance of the engine. Would recommend to improve equality of engine ouling.

Works great very easy to install. I can notice the difference when I start it up.

Good price and easy to install

Everything I read about the product. It did. And such an Easy install. And the proof is in the puddin! 318 thousand miles and still pluggin along!