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post #1 of 12 Old 06-10-2011, 12:28 PM Thread Starter
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Napa air filter

Hey Guys,
Got a 2001 F350 7.3L CCLB with an auto trans. I have the stock air filter system and was looking for a different air filter to get better mpgs. I have used a K&N in my old 7.3 and didn't like what it did to the air intake hose. I have heard that you can do some work with the intake system and purchase a special Napa filter for the 7.3. Is it true? If so, does it really get better fuel economy? I get about 16.5 on the highway empty, and about 12 hauling a 4k trailer in the city.
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post #2 of 12 Old 06-10-2011, 07:06 PM
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Here is a hastings number for what you want AF2329. I converted from a napa number. This filter has a 4" outlet that you need a short piece of exaust pipe to conect to the intake hose. I took the air filter box out of my truck and this filter lays on the fender where it was. Cost was about $40 an it puts K&N right to shame.
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post #3 of 12 Old 06-10-2011, 07:17 PM
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In case you want. The fram part # for this filter is CA6818.

1997 F-250 4x4. 5 speed, 6637,exhaust,dp-tuner,dana 60, 33's
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post #4 of 12 Old 06-11-2011, 07:38 AM Thread Starter
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Great! Thank you so much. Does it really get better fuel economy?
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post #5 of 12 Old 06-13-2011, 02:42 AM
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I installed the napa 6637 two weeks ago and the mpg gauge on the truck shows an increase of .6 mpg. The performance does seem better, just accelerates a little quicker. If I were to keep my foot out of the throttle and drive the same as I was before the filter, the mpg my be a little better. The turbo does make a lot more noise than before. It don't bother me, but may others.
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post #6 of 12 Old 06-13-2011, 06:22 AM
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Check out this link

Intakes...who and what!.. ( Write up )

When I installed the DIY intake I didn't notice a significant increase in fuel economy. Opening (straight pipe) the exhaust was the magic ticket.

Jason

O.T.F.D. Volunteer 19

Great White - 2003 7.3l F-250 4x4 CCSB -102,000 miles and tickin
DIY intake - 4" Straight pipe - HPX - CAT ELC - 203 t stat - billet t stat housing - coolant filter - dual alt radiator hose - 12V Air compressor - 5 gallon air tank - Air line quick connects - AIR HORNS!

Hers: 2013 VW Jetta TDI

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post #7 of 12 Old 06-13-2011, 10:36 AM
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Quote:
Originally Posted by mxfever090 View Post
Check out this link

Intakes...who and what!.. ( Write up )

When I installed the DIY intake I didn't notice a significant increase in fuel economy. Opening (straight pipe) the exhaust was the magic ticket.


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post #8 of 12 Old 06-13-2011, 01:07 PM
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We have the orginal..Tymar kits complete with everything needed..PM for pricing
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post #9 of 12 Old 06-13-2011, 05:09 PM
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Quote:
Originally Posted by mxfever090 View Post
Check out this link

Intakes...who and what!.. ( Write up )

When I installed the DIY intake I didn't notice a significant increase in fuel economy. Opening (straight pipe) the exhaust was the magic ticket.
Did opening up the exhaust really help? I've herd so many people ( on this site included) say it didnt help a bit. I'm still running stock exhaust but have been thinking about going to a straight pipe

2000 F-250 Reg. Cab Long Box, 4x4, Auto., 285/75/16 GY Dura Tracs,

1990 Mustang 5.0 LX hatchback, auto, Prowler orange. Car has full exhaust, E-cam, Trick Flow upper and lower intake, ADJ. fuel pressure reg, A/C delete, AOD with hardened shafts shift kit and TCI 3500 stall, not yet installed 3:73 gears, and TFS Twisted Wedge heads
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post #10 of 12 Old 06-13-2011, 05:23 PM
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Absolutely, more boost, spools quicker, lower EGT's, definitely better!
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