i do have a doneldson pre cleaner though.

And thats why!! Best thing you can do for a cars intake system.

yep and seeing as they cost around $30 i am amazed that there aren't more around.

When I make the snorkel for the ute I will be making it so that I can drop a doneldsom pre-cleaner on top for longer trips. They look a bit silly, but you can't deny they work.

What about the internal sock style pre cleaners? Are they as efficient? At least you can hide them

not even close to as good

How the worm turns a thread like this four or five years ago would have been full of "I have a fully sik K&N and my car makes 50hp more power and they filter better because it says so on the box and its full sik and paper sux" replies.

A couple of other points about reusable filters.

A) Unifilters stop the air filter box working properly. They aren't designed to be in a filter housing - rather they are designed to replace a "free air" filter like a pod, typically on a bike or race engine where they are serviced before every event. Filter housings in a road car are designed so most of the dirt that hits the filter falls off. That's either because the filter is cyclonic like a 1.0 or 1.3 filter housing, or gravity assisted like a Jimny housing, where the air has to be pulled up through the filter - the big stuff just falls off.

With a unifilter and it's sticky surface, everything just stays in the filter, clogging it many times quicker than a paper filter.

B) NO filter should be serviced until flow has reduced to a point where engine performance is affected. The dirtier a filter, the BETTER it protects your engine. In a 4WD, filtration is more important than the truly tiny amount of power you'll gain from a clean filter.

C) Donaldson precleaners are the shizzle. There's no reason, if you have the room, they can't be mounted under the bonnet of the looks of them are too offensive and you don't need a wading snorkel. Lamborghini did this with the LM002.

Steve.

How the worm turns a thread like this four or five years ago would have been full of "I have a fully sik K&N and my car makes 50hp more power and they filter better because it says so on the box and its full sik and paper sux" replies.

A couple of other points about reusable filters.

A) Unifilters stop the air filter box working properly. They aren't designed to be in a filter housing - rather they are designed to replace a "free air" filter like a pod, typically on a bike or race engine where they are serviced before every event. Filter housings in a road car are designed so most of the dirt that hits the filter falls off. That's either because the filter is cyclonic like a 1.0 or 1.3 filter housing, or gravity assisted like a Jimny housing, where the air has to be pulled up through the filter - the big stuff just falls off.

With a unifilter and it's sticky surface, everything just stays in the filter, clogging it many times quicker than a paper filter.

B) NO filter should be serviced until flow has reduced to a point where engine performance is affected. The dirtier a filter, the BETTER it protects your engine. In a 4WD, filtration is more important than the truly tiny amount of power you'll gain from a clean filter.

C) Donaldson precleaners are the shizzle. There's no reason, if you have the room, they can't be mounted under the bonnet of the looks of them are too offensive and you don't need a wading snorkel. Lamborghini did this with the LM002.

Steve.

C) Donaldson precleaners are the shizzle. There's no reason, if you have the room, they can't be mounted under the bonnet of the looks of them are too offensive and you don't need a wading snorkel. Lamborghini did this with the LM002.

Steve.

That's awesome. I bet Peugeot were also pretty paranoid about other sources of getting dirt into an engine if they were willing to throw that much work at the air filter - I bet the dipstick seals well, the rocker cover breather seals well and isn't a sloppy press fit, and the fuel is well filtered.

Steve.