My 2001 7.3 has just under 300k on it.. it's got a intake and mild programmer (nothing special) and 4" turbo back exhaust with not muffler.. I pull a 22ft boat and a 21ft trailer with a 40hp JD tractor all the time.. and this wheel made a great deal of difference on top end spool (no more turbo surge) spools a great deal better than the stock wheel while loaded.. don't really concern myself with watching fuel mileage so not sure if it will make a difference there. As far as sound goes it don't seem much different at idle and low rpm take off than my stock wheel... BUT at high rpms sounds great has Slight whistle I can hear in the cab but not like the WW on my buddies truck which really gets annoying on long interstate trips pulling a load.. over all I'm extremely happy with the product all the way around and it wasn't at all hard to install myself..

Big thanks to riffraff diesel products!!!

Good product, good quality

Was machined very well and looked to me good quality. Noticeable proformance increase, not much boost loss. Didn't even really know I was getting surge until I installed this wheel and felt the difference from stock. Very pleased with purchase.

Short back story - back in November, I installed an expensive, what was supposed to be the granddaddy of all drop in OBS turbos when I installed my RiffRaff up pipes. Needless to say, I was pretty disappointed. It spooled a little earlier and sounded cool, but otherwise didn't perform any better than my stock, used and abused 280k mile turbo. So, I paired this wheel with the 1.0 exhaust housing and a new Garrett center cartridge, and all I can say is holy crap!! For reference, my truck has stage 1 injectors, electric fuel system, t500 HPOP, intake and exhaust, and a 6 position chip and sits on 35" tires. I took it easy for about 10 miles to make sure everything was good, and then slowed to about 30 and matted the pedal. I was doing 80 in a matter of seconds, I haven't had a stupid grin stuck on my face like that in a long time!! The boost was instant and she just took off. If you're thinking about buying this wheel, do it!!

Installed on a 1997 7.3 and noticed an immediate difference. I installed it without removing the turbo from the truck, and without using an impact gun. If you take the down pipe off, and place a screwdriver wrapped in a rag into the turbine side of the turbo, it will hold the wheel still enough so you can remove the compressor wheel without causing stress to the shaft or harming the turbine. There is not much change in whistle, but you can definitely feel a difference right off the bat. The exhaust sounds a little deeper too. Cant wait to put on a 1.0 quick spool housing and really wake this turbo up!

Noticed the difference right away! My trucks first upgrade I guess you would call it haha! Very happy with it! spoils up way quicker and I'm sure it builds more boost * I don't have gauges yet*

Easy to install and it makes a big difference for the amount of money. Would definitely recommend for anyone wanting a mild performance upgrade.

I was expecting a difference, but the difference is amazing. Turbo lag is pretty much gone. There is no hesitation anymore as the turbo spools up. Throttle input is instantaneous now. Boost pressure builds much faster too. I loved my 7.3 before, but now I love it even more. This weekend I will be putting it to the test pulling my 28' travel trailer up to the mountains. Another great Riffraff products. Thanks Clay.

Quieter than my stock wheel (which was a little chewed up).
No more surge or flutter... just clean, smooth quiet boost all the way up.
Perfect.