Works as advertised, installation was simple. It's been in for two fill ups.
I have 337K miles on this stock engine & manual 5sp od trans. Under 2k rpm (about 68 mph), Tow or Economy Mode- right now I’m avg 17.5 -18 mpg. Without the chip I avg 16.5 mpg. Anything over 2k rpm, chip or not- this is a fuel drinking machine- 15.5 mpg. Overall very pleased with the performance. I’m not using the 5th and 6th position. But I did trying those settings and the throttle response & torque are unreal!
Again, very pleased!
Next purchase, Lord willing- adding an Aux gearbox from Gear Vendors- I should be able to cruise 80, just under 2K rpm.

the power levels really woke up my older 2001 F550 powerstroke, It is mainly used as a hauler so it will great for what I need. RiffRaff diesel is the bomb, ever since they got me out of a bind years ago they are. Thanks for the Riffraff team, they sell great products!!

I got to say it definitely woke my 03 7.3l up.. the power is amazing.. i can now burn rubber when ever and roll coal.. I definitely recommend this chip if your looking for power..but on the down side the shifting in my transmission is way fast and it doesn't shift as smooth as it should.. it almost slams in to gear but nothing that's to crazy.. it's feels like a hop.. also the stage 6 will make my check engine light come on and im not sure why.. so if I switch it to 5 or to 4 where I like it most the time it shuts off.. the mph isn't better I think it's just the same not much different there.. not to say it won't work for other 7.3l but it doesn't work for mine... all and all I love the chip and have no regrets on the purchase... just a reminder when you do buy it and go to install it take your ecu apart to clean the connection really good.. I didn't and it didn't work.. but once you expose the copper it will work amazingly..

Very easy intallation. I could tell the difference immediately in economy mode when I switched from the factory setting as far as performance and even power. My mpg increased from 17 to 21 just driving to and from work. On a recent road trip my mileage went up to 23 if I stayed at 65 (1850 rpm)

This weekend will be the test of tow mode when I hook onto our 30' camper.

With fuel at $5.39 a gallon, economy mode will save me $$ at the pump.

Works excellent. And definitely woke my truck up. Very happy with it. I cant wait to add on the edge cts3 to monitor everything. No complaints so far!

So far I love this chip and the simplistic sticker that says what position your in also takes out the counting each position as well would definitely recommend this product

I like it , it really helps when you’re pulling a big tractor and or my boat

Works very well. Really put some pep in the truck.

First off, makes your OBS much more fun to drive. This works best with aftermarket air and exhaust. Level 3 is all you need for better drivability.
Very easy install, just make sure you spend a little extra time cleaning contacts on PCM.
Did have a concern about hard shifting from 2nd to 3rd after install but fresh synthetic fluid, new transmission filter and deep pan solved that.
I would buy this again for my next truck.