Have ordered these little gems from Ballards: See bottom of page

http://www.ballards.cc/Text/12028785...CATALOGUE-2008

Possible (and very cheap) alternative to the DNA stage 2 filter - or in addition to...

Also if drilling holdes in your airbox (ala Kevs mod) makes you nervous about water and dirt - these will also do the trick.

Will let you know how they pan out when fitted....

Hi did this work?

Have a look at these sites mate...

http://www.dual-star.com/index2/Serv...ox%20Vents.htm

http://www.heeters.com/AirFilters.shtml

Why not just get a DNA Stage 2 instead?

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will i still need to do the 4 (5) holes on the air box can you help me with the 5th hole as I cant see it in the air box mod photos?

We have covered these prefilters before, I will go over it again for the new guys.

These filters are used as prefilters, which means they are used before the main filter not after the main filter. If they are used after the main filter you will damage your engine, due to the filter materal not filtering the fine dust.

You can not use these filters on the side cover of the air box as this chamber is the main filtered area, you can use them before the main filter if you want.

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Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
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My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

My airbox is different (Aprilia Pegaso Strada) where putting vents in the side of the airbox is still on the right side of the main filter and therefore acts as a pre-filter. However, with the airbox vents I have used, if one were to replace the standard foam inserts with foam you cut from a propper foam filter and if you were to oil the foam with filter oil - I see no reason why you couldn't use these vents of the engine side of the main filter (provided you clean them periodically). It would be an interesting exercise I think.