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
-
first riffraff purchase
Just installed my filter kit yesterday. Filter is nice, prefilter fits snug. Only issue is the product description doesnt state that this is a replacement for a complete stock air system. I was missing only one piece of factory intake duct which rendered the included elbow useless. Luckily, i had extra 4" tube at my disposal so making it work was no issue. Had i known about this, i wouldve purchased the filter and sock alone and not the kit.
-
Flows well, looks great, is happier
Truck breathes better, sounds better, and seems happier. Install was easy, fits right in there. Nothing negative to say, shipping with RiffRaff is always lightning fast.
-
Great filter kit
Great breathing filter and very easy to install!! My truck is very happy now!
-
Riffraff Diesel 6637 Filter Kit gave my truck wings!
I recently ordered and installed this kit in my Ford F350 Super Duty 2002. It gave an obvious horse power boost and I actually love the new sound. Installation was very simple with the instructions that were included. Parts were quality, not just the cheapest versions that sometimes come in kits. Shipping was super fast! Highly recommended to anyone in a similar situation! Go Riffraff! Great price!
-
Budget greatness
great package simple easy to install been looking to make my own kit the whole time i owned my truck but for the price this was the best deal and saved me alot of time.
-
Pretty good
The kit is great! Wish it was a Donaldson water resistant filter tho. Other then that everything is very good quality, love the filter cover. Had to trim my airbox to get it to fit correctly, a little overpriced for a piece of steel tube, filter and a sock but if you just wanna be able to get everything shipped to you in a kit this is the product. THANKS RIFF RAFF
-
best filter kit on the market
fit was perfect. install took about 10 minutes. truck is definitely running better with the extra air flow, and turbo whistle is a plus too. I love everything about this would recommend to anyone. do not hesitate to buy from riff raff shipping was great too
-
my intake
Very pleased with the product. Truck runs better and the new filter really brought out that turbo sound haha. Product was shipped and delivered in a timely manner and everything arrived in perfect condition.
-
Cold Air intake vs stock with K&N
The cold air intake was an easy install but I didn't feel any noticeable power difference over the stock housing with a K&N filter. didn't hear any difference in turbo whistle. The verdict is still out.
'95 4x4 7.3 w/3" downpipe n 4" runback






