Another great part from riff Raff fits perfect took about an hour to install with the Y still in. Riff Raff continues to impress.

I thought this thing was a bit of a gimmick, but I figured I'd give it a shot based on reviews across the internet, and WOW! This should have been a factory part from Ford as part of the 7.3l design! I immediately noticed not only better throttle response, but the engine was significantly quieter at idle, all the way to nearly 2k RPM! I do have a tiny leak from one of the compression fittings, but I can probably work it out by simply removing and re-installing it. Best $50 I've ever spent on my truck!

Loved it

I got to say I was very skeptical of this part because I had a hard time believe something as simple as this I would see and hear a difference. It definitely quietened down the truck a little bit at idle (programmer makes it run around 750 rpm with current setting not a fan) but what impressed me most was the struggle to get up to the current fuel mileage was hard to do before adding this and now it gets there without issue. Went from 14.3 mpg hand calculated to 14.9 hand calculated while towing my bass boat. Without towing it was 14.6 mpg to 15.4 mpg for me that made biggest difference. Love the product and I will be buying much more from RIFFRAFF in the future as I go along with my truck build. Was bone dry stock before adding this and AIH Delete plug but it is a start and I'm happy with the results.

Fits like a glove. Great materials, gonna last a long time.

Easy to install and engine is alot smoother

Must have for any 7.3 Powerstroke!!!

This is the easiest modification I have done. Engine is noticeably quieter. O-ring on one side ripped, but customer service/technical advisor cheerfully gave me the spec. to get replacement locally. But this mod is so easy, that replacing the o-ring was a snap.

Looks good and fits as it should