So I noticed after installing, my truck seemed to start up a little bit quicker. And idle a little bit better. That was good enough for me to give it a 5 star review. Also install is pretty dang easy

I purchased this for 2 vehicles, but I have only installed on one, 2003 Excursion.
While I didn't notice any audible difference in the engine noise while on a stock program, when I adjusted the programmer to higher settings a lot of the rattle was gone, almost all of what a higher setting would normally add.

I definitely recommend this to anyone.

Looks and works great. Easy install

Amazing fit. Lined up to oil rail inlets perfectly. Literally installed in minutes.
Never disappointed with your service or parts. Thanks Riffraff.

easy install when you remove the spyder. idle noise might be quieter, might be placebo

I've got like 290K on my 1999 F350. I had to redo the seals on my HP oil pump and found this and the fuel system cross over.

I cleaned up the IPR valve and noted that the engine was a bit quieter, and noted that the oil cross over and the fuel cross over would make the engine quieter still.

I did the cross over and fuel cross over separately to see what the differences were. The oil cross over went in pretty quickly as others have described. It too me a few tries to get all the fittings locked down so there was no leakage of any sort. I'm very happy with that..

The big difference in noise reduction was at idle - It also appeared to lessen the noise at speed as well, but that was harder to tell. Performance wise, I have a mild 50 HP chip from a long time ago, and noticed, at best, a slight improvement to throttle response, but again, it's hard to tell.

For the cost - a nice improvement to the running of the engine.

Installed this while doing an oil change.
Found it easiest to remove the intake up to the Turbo.
Be alert this uses standard sizes not metric when installing.

Easy install, make sure you use the loctite or it will leak! Over all smother idle!

Definitely made the truck quieter at idle.