Installed this and FRx at same time. Unlike FRx, this was a very easy install. I pulled the spider because I had to replace my boots at the head anyway. After installing both, only change noticed was possibly the truck was slightly more quiet. Perdels on #8 actually increased by 0.3 to 0.4% after install for a total of 5.1% average. The big difference came when I replaced the dark blue CPS with an original black CPS, dropping perdels down to as low as 1.8% on #8 with an average of 2.2%. Engine is quieter and feels more smooth now.

The part came in as promised, easy to install and works as advertised. Made my start up easier and idles quieter on my 99 7.3 powerstroke

Great product! good quality, fast shipping, perfect fit. No complaints. Made my truck a lot quieter at idle and maybe even a little going down the road. When truck is cold started now it doesnt have any injector noise almost as if it was already warm. Thanks for another quality product.

I’ve installed this onto a f-550 7.3L mechanics truck. I’m not sure if it has made the engine run any quieter or not, but I have this crossover on my other f-350 7.3L work truck & thought I would give it a try. Install was pretty simple. Only took 20 or 30 minutes. Good fit.

First got this for my personal 7.3 and noticed a little difference but I bet if I hooked up a scan tool you could see a huge difference with icp signals. Liked it so much I installed it on a customers truck after a new set of injectors.

Supper easy for me to install. Great product. My 7.3l excursion is not as loud now and smoother. I plan on purchasing more products from riffraff.

Amazed! A simple, well made product that not only dramatically silenced my 2001 f250 but also eliminated injector chatter under hard acceleration. A Riffraf must!

Perfect fit and finish definitely a noticeable difference in idle

The item was as advertised, the how to video put out was spot on. Installation was very easy, the part has been in for almost a month now with no leaking issues.