Riffraff Diesel 6637 7.3L Intake Filter Kit
This kit contains:
- Riffraff Diesel 6637 Filter
- Optional AFe Big Boost washable, or a Donaldson Blue® Filters
- Custom "Riffraff Diesel" Pre-filter Cover (Optional $29)
- Filter Adapter Tube
- 94-Early 99 Uses a 45* Tube
- Late 99-03 Uses a straight Tube
- SS T-Bolt Clamp

Late 1999-2003 Powerstroke production date 12-7-1998 and after
475 Reviews Hide Reviews Show Reviews
-
Good price great product
Bought this kit for an early 99 and everything came quickly and all parts were included. Very easy install. Best thing I've done to my truck so far, and the added turbo whistle is a nice bonus.
-
Bring 'Tha Noise!!
Just installed on my stock late '99. Kit is of very good quality & was easy to install with no trimming. Oh yeah, it sounds KILLER!! Turbo spools much faster down low and and pulls a little stronger in the upper rpm's. Hopefully I see a few bonus mpg's too.
Thanks Clay & co! I'll be back for more. -
Breathe Turbo!
This is the best intake kit you can buy for your 7.3. It allows the turbo to spool quicker generating power through a wider range of the engine RPM. The install only took 30 minutes or so, with no cutting required on the 94-98.
-
air filter
Easy enough to install and figure out. If you have a 7.3L with 2 batteries, be prepared to cut the plastic tray that holds the left battery. They didn't include that step in the directions...
-
Great product
Love this product. Been running these filters for 2 years and have only been happy. Push 4 more psi of boost than stock intake. Breathes great, more power, and sexy whistle!
-
Better air
Truck breathes way easier, more pulling power up hills, and a nice mellow sound. great value for the performance, thanks
-
Works Good
Easy install. It helps it rev faster from the lower end.
-
Great Product and Service!
Just installed in less then an hour!
Better throttle response immediately.
Shipped to Canada in 7days, Ill be back for more, Thanks Clay -
The right bang for the buck !!
Very pleased with this intake system!! Noticed improved mileage and better throttle response almost instantly. .






