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K&N - Diesel Accessories! K&N is the world's leading manufacturer of washable performance air filters and air intake systems. Using filtration technology developed and refined over the last 40 years, K&N Diesel air filters provide the protection you need and the performance you want. Based on a foundation of 6 layers of oiled cotton gauze sandwiched between two epoxy coated metal screens, K&N air filters for diesel trucks provide increased performance, protection and a lifetime air filter that never needs to be replaced. Adding diesel performance has never been easier. Diesel Parts - Diesel Accessories!

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Old 01-08-2012, 11:14 AM
ZombieSoldier's Avatar
ZombieSoldier ZombieSoldier is offline
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Join Date: Jan 2011
Location: Hinesville/ FT. Stewart, Georgia
Age: 39
Posts: 1,837
Gender: Male
Vehicle: Ford
Trim Level: F250 Lariat
Color: White Beauty
Engine: 2008 - 2010 387ci (6.4L) Power Stroke 350hp 650tq
Rep Power: 9
ZombieSoldier is on a distinguished road
Default looking for a filter

I am looking for a K&N filter to test for my intakes that I make and sell. Currently I use the Donaldson B085011. It has dimensions of:

Length: 11" (279 mm)
Outlet Diameter: 8.5" (216 mm)
Inlet Diameter: 4" (102 mm)

going by the K&N website, K&N part number RF-1027 would be pretty close with dimensions of:

Length (in) 8.000 in.
Air Filter Top Measurement 4.500 in. diameter
Air Filter Bottom Measurement 6.500 in. diameter
Inlet Flange Inside Diameter (in) 4.000 in.

what do you think? do you have a better option?
"White Beauty" 2008 F250 Spartan tuning (standard and custom), Spartan TCM, 4" Powerstroker67 ceramic coated downpipe, 5" Flo-Pro exhaust w/muffler and 6" stainless MBRP tip, No Limit Fabrication cold air intake, No Limit Fabrication CAC pipe/intake elbow, EGR cooler delete, Elite head studs, Elite 71mm atmosphere (billet Precision wheel), Air Dog II DF-165, SunCoast transmission, River City Diesel torque converter, 20x9 BMF Novakanes

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Old 01-09-2012, 12:53 AM
Rustin Rustin is offline
Diesel Forum Member
Join Date: Jan 2011
Location: Redding, CA.
Age: 43
Posts: 1,488
Gender: Male
Vehicle: Ford
Trim Level: XLT
Color: GREEN
Engine: 1999 - 2003 444ci (7.3L) Power Stroke
Rep Power: 9
Rustin will become famous soon enough

I'm sic of K&N. their oil system and filters are not like they used to be. I just tossed my K&N to the side because of the locals over here are over priced on there cleaning supplies. Even though my intake is stock and only sees highway and city mileage It has become a pain to clean every thirty thousand miles when the check filter element goes off. The filter has become on usable after three cleanings. The filter its self leaves residue in my intake, this is on top of my CCV leaving residue. If I ever go back to a similar filter, I might look into green filters. I met them at the SEMA show. It seems like a good product, but K&N has ruined that side for me. I'm Going back to a Donaldson paper element.
[COLOR="Sienna"][SIZE="2"]Early 1999 F-250 Ford Super Duty. Powered by a Navistar T444E (7.3l Power Stroke) Diesel.
That is using AMSOIL from Jefferson State Diesel. And Liquid MPG fuel treatment from Jefferson State Diesel.
Still bone stock and getting 17mpg city.
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