Flows more than the stock airbox and freed’ up some room in the bay

I had the cheap amazon china one and the filter sucked as well as the couplers and clamps. This is the best kit for your money. The turbo is so much more pronounced but not obnoxious like my amazon one. Compared to the outrageous prices of K&N and other brands this was the best choice in my opinion. Very happy with riff raff products!

Worked well and makes the engine look cleaner!

None

Added a little boost but the turbo is louder with more air flow to the turbo. Next I will replace the turbine wheel.

Easy Peasy. Intstalled the whole kit and cleaned my captiain's side inner fender and valve cover in about 35 mins. Not all the increased intake sound everyone said it would make. But I know its a significant increase in air intake to the turbo -measured against the stock air box. If you don't think you can do it ... think again, because it's simple. Buy it now if you have the stock airbox on your 2000 7.3. Thanks Clay!!

Great filter, easy install even though I bought the bent pipe I was able to make it work in my truck. Definitely more air is getting pulled into the truck and you can definitely hear that turbo sing a lot better

This is the easiest upgrade any Powerstroke owner can do. Quality powder coated adapter and a filter than you can get your moneys worth out of. I’ve had plenty of dirty intake tubes with the factory air filter set up regardless of the brand of factory air filter. With the 6637 I’ve never seen dirt make it through. It’s by far one of my most recommended upgrade you should do to your 7.3!

Thanks riff raff.