Easy to install and had a noticeable difference

I bought this honestly doubting it would even work. Glad to say I'm eating my own words. The only reason I didn't give it 5 stars is because of cost. I feel it does more than anyone should expect, that being said, I just feel it's pricey for a bit of tubing with some fittings. All in all. Worth it

Great product put on my 2000 7.3 and made idle smoother injectors sound even oil pressure is even runs a lot smoother

Installed this on the truck without removing a thing. Went in pretty easy. Truck does seem to idle smoother and took some of the cackle out of the motor. Sounds quieter. Great product and well made.

The install was pretty strait forward. 15 min install, i didn't removed anything else to install it, fit perfectly and quiet the engine. you will see a big difference in the first 150 miles (time to get the air out of the system).

Riff Raff makes quality products at affordable prices. I continue to be impressed. This is a ten minute easy install that quieted my motor down and helps the longevity.

A little money spent for some preventive maintenance in the long run. It took about 30 miles to purge the air out (like the directions said), after that, the 7.3 is a little quieter. Great product and peace of mind.

Very high quality stainless pipe, large diameter, great fittings and seals. Ford should have designed this fix, and installed it on all 7.3 rigs. Made my truck smoother at idle, and quieted down the #8 Injector clackety clacking. Would highly recommend this to anyone. Fast easy painless install too.

Great product great quality. quiets the motor down a little and makes the it idle a little smoother.