bhaf big honkin air filter

[charlie-2]

can you use a filter from a big truck, a friend got one from a Mack shop to use on his cummins. he accidentally ordered two and was wondering if it would fit on a 7.3l.

[CT Performance, Inc.]

Depends..check the specs and it it fits give it a shot.

[Dietoremain]

well the 6637 barely fits.... soo i dunno haha.

[CT Performance, Inc.]

Tymar fits perfect

[NCHornet]

I don't like the looks of the DIY under the hood, just looks out of place. I much prefer the Ford AIS, looks stock, 30% more airflow and Nothing filters better. I suppose you could make it work, just make sure you do a UOA report to check your silicon levels after you install it. Mine are always less than 5. Dirt = death to a diesel, so to me the air filter isn't worth skimping on. YMMV.

[CT Performance, Inc.]

The AIS will provide excellent filtration efficiency, but will not improve overall restriction or allow much additional air flow in the configuration that Ford uses. The Tymar Intake will provide excellent filtration efficiency as well as decrease restriction to the turbo and add significant air flow.

quote:
“Tymar is going to give you better flow but AIS is going to give you unmatched filtration…the AIS plus it will last a LONG time, like 60K miles…”

Although the AIS will give better filtration efficiency, you are only talking about 1/10 of a percent over the filter Tymar Performance Intakes use at initial filtration efficiencies. Not enough of a difference to really differentiate between the two.

For the longevity, you have to start talking about restriction ranges in both stock and aftermarket applications and how dirt will affect them. AIS has a larger capacity, but not across the restriction ranges once installed on the truck. Because of the configuration you are not lowering restriction significant over stock levels, but you are receiving better filtration compared to the stock intake.

The Tymar Intake will allow lower restriction levels and lasts approximately 15K miles in a restriction range LOWER than stock. If you want to go with longevity of filter, you can continue using the same filter and will simply not experience the positive benefits of lower than stock restriction levels.

The WIX/NAPA 6637 is not a hydrophobic (water resistant) element and using it as an open element should be avoided. There are other concerns such as providing minimal radial clearance, isolating engine vibration, positioning away from rain drip channel, etc. But, I just wanted to draw a clear difference between copies, DIY efforts, and a Tymar.