6637 Mod
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Senior User
Joined: Sep 2003
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From: Long Beach
6637 Mod
Hey Guys I am in the process of adding a 6637 instead of cold air style K&N.
I have a cut piece of 4" exhaust tubing, which fits nicely inside the 6637 filter, the Ford intake that goes from the CCV to the air filter box is 4 1/4"... Can I just clamp it or should I try to get my tube pressed out to 4 1/4 on one side?
Thank you,
I have a cut piece of 4" exhaust tubing, which fits nicely inside the 6637 filter, the Ford intake that goes from the CCV to the air filter box is 4 1/4"... Can I just clamp it or should I try to get my tube pressed out to 4 1/4 on one side?
Thank you,
Thread Starter
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Senior User
Joined: Sep 2003
Posts: 134
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From: Long Beach
I just bought a new one... and measured it... It looks like it will fit once clapmed down... Just trying to get as close to a tight fit 1st.
Thanx for the quick reply.
By the way. the 4" tube is to prevent the hose from falling off right? Clamping the house down on something strong?
Thanx for the quick reply.
By the way. the 4" tube is to prevent the hose from falling off right? Clamping the house down on something strong?
Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
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From: Charlotte-Fairbanks-Bflo
I see this all the time. Mine is a 99.5 and my 6637 more or less slid right on and the factory clamp was perfect. I did have the aid of a FTE member here, but once I watched it being done I probably could have saved the 40 mile drive.
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Joined: Mar 2007
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From: St. Clair, MO
The only thing I had to go back and do on mine was to lightly rough up the neck of the filter and the inside of the tube (it had started to slid out after the first tightening). After that it hasn't moved in nearly 6 months.
