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I bit the bullet and stuck one in my EFI GQ about a month ago.
Noticed a marginal improvement in economy, but only in ideal conditions...ie cruising on highway etc.
Mine improved the low down power on the 3litre RB30.
Then I f@rked it up by installing a snorkel and lost the gains.
They were quantative gains as well ie Dyno.
CJ
http://www.4wdlinks.com.au/gallery/cjburns7
http://cjburns7.tripod.com
Probably work out good in the long run $ wise, but I have used these on road cars and found that very fine dust would get through (this happened on 3 vehicles), so will go for a foam filter next time.
Depends.....Ive got LPG with a impco system on my GQ, and it made a pretty decent difference when i pt the K&N on, better economy and more power, ... revs a bit quicker.
Josh_GQ wrote:The only reason to get one would be so that you can clean and reuse, and i've heard that finer filter works better at keeping dust out.
I agree here.
I have a kn as the pre cleaner element, with a finer filter as the main element. The kn keeps the finer filter element cleaner, and the kn is a whole lot easier to keep clean than the foam unit. You can stick an old stocking over the kn to keep the really big clumps out of the fins.