im getting a new airfilter and just confused on what is better in the airfilter world but im getting an outerweras airbox lid and an outerwears filter cover no matter what so any info would be nice ill take whatever you got to tell me
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Ride It Like You Stole It
im getting a new airfilter and just confused on what is better in the airfilter world but im getting an outerweras airbox lid and an outerwears filter cover no matter what so any info would be nice ill take whatever you got to tell me
2005 400EX
99-04 plastic, 155 main jet, 42 pilot jet, HMF Sport Series Slip-On, UNI air filter, LSR PB Block off plate, TAG bars, AC nerf bars, 15/39 gearing, CST Ambush rears, stock Ohtsu fronts
1973 Yamaha DT360A Enduro
hooker headers/expansion chamber no other pipe
98% of the teenage population does, will try or has tried smoking pot. If you're one of the 2% who hasn't, copy & paste this into your signature.
Code Red Racing #23
lets fire it up again boyssorry about that. this is beat to death and always starts a good war amongst the normally peaceful society of A.A.D.S. members in the 400 forum. lol. my vote is for k&n by the way. steve
2019 Maverick X3 XDS Turbo R
2003 TRX 400EX
2016 HONDA RANCHER
K&N's have better flow, but more flow=less filtration.
K&N's on cars, Foam on quads. The foam quad filters have large surface areas to make up for the lost flow and filter better.
Ride It Like You Stole It
thanks and i know soeone who drag races and he runs kn on his racers and uni and kn on his 6-8 other trail quads but he likes both he said kn for racing uni for trail cause it has about the same performance gains for 1/2 the price
2005 400EX
99-04 plastic, 155 main jet, 42 pilot jet, HMF Sport Series Slip-On, UNI air filter, LSR PB Block off plate, TAG bars, AC nerf bars, 15/39 gearing, CST Ambush rears, stock Ohtsu fronts
1973 Yamaha DT360A Enduro
hooker headers/expansion chamber no other pipe
98% of the teenage population does, will try or has tried smoking pot. If you're one of the 2% who hasn't, copy & paste this into your signature.
Code Red Racing #23
with either one i suggest running a k&n outerwears then it helps with the dirt and helps with water too. steve
2019 Maverick X3 XDS Turbo R
2003 TRX 400EX
2016 HONDA RANCHER
Ride It Like You Stole It
ya im deffinately getting the pre filter
2005 400EX
99-04 plastic, 155 main jet, 42 pilot jet, HMF Sport Series Slip-On, UNI air filter, LSR PB Block off plate, TAG bars, AC nerf bars, 15/39 gearing, CST Ambush rears, stock Ohtsu fronts
1973 Yamaha DT360A Enduro
hooker headers/expansion chamber no other pipe
98% of the teenage population does, will try or has tried smoking pot. If you're one of the 2% who hasn't, copy & paste this into your signature.
Senior Member
I like foam filters. I run a moose on my 300 and had a UNI on my old 400.
1998 300ex
1969 Jeep CJ5
Senior Member
UNI for sure k&n has POOR filtration. I have pics to prove it.
05' fan cooled 416ex, zrpilot's motor, GT Thunder 10.8:1 piston, GT Thunder HD headstuds, HD cam chain, HRC cam, GT Thunder 8 plate clutch, GT Thunder XC Port & Polish, GT Thunder XC CDI, terry cable throttle, 450r carb(48 pilot, needle 3rd from the top 178 main), white brothers e series pro-meg muffler, white brothers header,UNI, aluminum air box no lid, galfer ss brakes lines, houser +2 arms, TCS dual rate shocks with rezzies, lonstar +2 swingarm and +4 axle, LSR billet sprocket hub, tag fat bars, maier race plastics, kenda knarly mxr 18s kenda klaw mxf 20x6, spal 4" puller fan, 14/36 gearing and ..... Dual rate Axis rear shock, AMR monster coil, roll design +2 steering stem
06' CC F-250 Diesel FX4 6" lift 20x12 welds 35x13.50 mickey thompson's 4" TB exhaust no cat 2 jl 10"
Registered User
I have the UNI but would like to give the K&N a shot.
Senior Member
here is a pic of the inside of my air boot after riding in some pretty dusty conditions. This is with the K&N properly cleaned and oiled with an outerwears on.Originally posted by riotact
I have the UNI but would like to give the K&N a shot.
This is a pic of the air boot after riding at the same place for the same amount of time in the same if not dustier conditions with the properly cleaned and oiled UNI with NO outerwears.
that one dirty spot is where i prob missed when wiping it out from the K&N and the big pieces just fell in when removing the filter.
Still want to give K&N a try???
05' fan cooled 416ex, zrpilot's motor, GT Thunder 10.8:1 piston, GT Thunder HD headstuds, HD cam chain, HRC cam, GT Thunder 8 plate clutch, GT Thunder XC Port & Polish, GT Thunder XC CDI, terry cable throttle, 450r carb(48 pilot, needle 3rd from the top 178 main), white brothers e series pro-meg muffler, white brothers header,UNI, aluminum air box no lid, galfer ss brakes lines, houser +2 arms, TCS dual rate shocks with rezzies, lonstar +2 swingarm and +4 axle, LSR billet sprocket hub, tag fat bars, maier race plastics, kenda knarly mxr 18s kenda klaw mxf 20x6, spal 4" puller fan, 14/36 gearing and ..... Dual rate Axis rear shock, AMR monster coil, roll design +2 steering stem
06' CC F-250 Diesel FX4 6" lift 20x12 welds 35x13.50 mickey thompson's 4" TB exhaust no cat 2 jl 10"
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