6637 air filter?
Elder User
Joined: Feb 2007
Posts: 857
Likes: 0
I'd recommend doing a search on 6637 and you'll find tons of information. I bought one from NAPA, removed my air intake box and attached the 6637 to the hose that had been attached to the air box. It took about 10 minutes. It's a little noisier but it sure allows the engine to breath.
Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
Yes it will help the engine breath better. also you will hear the turbo allot more if you do this mod. also do a search of the 6637 and if you have any more questions try posting down in the 7.3 Forum
