best intake for 7.3???
Senior User
Joined: Jul 2004
Posts: 180
Likes: 1
From: st.petersburg, fl
I have a 6637 now , it is loud. I just ordered the AIS last week .i will try to link it for you.
[FA-1759]Ford 7.3 liter Power Stroke Diesel AIS Extended Life Filter Kit(FA1759) - Diesel Filters,Additives,brake rotors, and brake pads for Chevy, Dodge and Ford Diesel Trucks
[FA-1759]Ford 7.3 liter Power Stroke Diesel AIS Extended Life Filter Kit(FA1759) - Diesel Filters,Additives,brake rotors, and brake pads for Chevy, Dodge and Ford Diesel Trucks
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Like mentioned above, it depends what you want.
In all reality, the stock paper filter is perfectly fine for stock trucks. But what fun is that...
The 6637 is the most popular. It's a DIY filter that is cheap, filters and flows well. It can be obtained from main retail and online stores and lasts a long time. It is a good overall filter without being exceptional in any catagory.
The AIS I my choice. I ran a 6637 for about 2 years and now have my AIS. The AIS is the best filtering system while still flowing enough for (reportedly) 400-500hp. It also lasts a LONG time and comes with bragging rights. Not many people can say they use the same kind of filter as the M1-A1 tank. It's also more expensive than the 6637 and replacement filters are pricy but they have a long life.
Other options include aFE and S&B for quality intakes. Generally people who have high power machines go with these kits because they can flow enough air to support the demand.
In all reality, the stock paper filter is perfectly fine for stock trucks. But what fun is that...
The 6637 is the most popular. It's a DIY filter that is cheap, filters and flows well. It can be obtained from main retail and online stores and lasts a long time. It is a good overall filter without being exceptional in any catagory.
The AIS I my choice. I ran a 6637 for about 2 years and now have my AIS. The AIS is the best filtering system while still flowing enough for (reportedly) 400-500hp. It also lasts a LONG time and comes with bragging rights. Not many people can say they use the same kind of filter as the M1-A1 tank. It's also more expensive than the 6637 and replacement filters are pricy but they have a long life.
Other options include aFE and S&B for quality intakes. Generally people who have high power machines go with these kits because they can flow enough air to support the demand.
Laughing Gas
Joined: Nov 2010
Posts: 1,193
Likes: 2
From: D.C. but heart's in TEXAS
AIS with a fender sleeve is fantastic for up to some decent HP numbers. But for 450+ hp, you're going to have to go with an open element like an aFe Stage II intake. But even with some performance injectors, the AIS with a fender sleeve flows plenty of air, filters outstandingly, and has a lifespan of about 50k depending on environment (pavement versus dirt roads).
Locomotive breath
Joined: Jan 2006
Posts: 1,354
Likes: 1
From: Mid Oh. Ponderosa
I ran the 6637 for 6 years and just changed over to the Ford AIS 3 weeks ago. Main reason, it IS quieter and I seem to get a little better throttle response, also a slight mileage improvement.
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