K&N Air filter
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Road Warrior
Joined: Mar 2009
Posts: 1,471
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From: Toledo, Ohio
K&N Air filter
Tried to search for previous post on the K&N air filter, but couldn't find what I was looking for. I recall a specific one that will boost acceleration/hp? Can anyone give me the part no. or tell me which one it is? Also, is there a noticeable difference from stock? Thanks gents
Tourer
Joined: Mar 2013
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From: Tampa Bay
Although, some people may argue this, for a stock motor or even a stage1 you'll notice little or noting in real world difference simply by switching to a K&N. If your running open exhaust and you switch from stock to a high flow AC you may have to rejet if it creates an overly lean condition.
Last edited by Slammed-N-Senseless; Sep 18, 2013 at 12:28 PM.
Road Master
Joined: May 2012
Posts: 1,140
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From: Arkansas
Tried to search for previous post on the K&N air filter, but couldn't find what I was looking for. I recall a specific one that will boost acceleration/hp? Can anyone give me the part no. or tell me which one it is? Also, is there a noticeable difference from stock? Thanks gents
Club Member
Joined: Aug 2008
Posts: 22,857
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From: Lafayette, Louisiana
I picked one up on eBay today for a fraction of the price anywhere else. Visit k & n's website to look up the part number for the one for your bike then take that part number and put it in ebay's search engine.
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
Tried to search for previous post on the K&N air filter, but couldn't find what I was looking for. I recall a specific one that will boost acceleration/hp? Can anyone give me the part no. or tell me which one it is? Also, is there a noticeable difference from stock? Thanks gents
Website gives details http://www.knfilters.com/harley_custom.htm
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Road Warrior
Joined: Mar 2009
Posts: 1,471
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From: Toledo, Ohio
My bad. I guess I am assuming it's the stock air filter, but Idk? Bought the bike this year from oo who lost a lot of his mental capacities due to a stroke. What he did recall is it has an Andrews ev-27 cam and the cam bearing was swapped out at install. When I took it to HD to have it inspected, I was told the pipes weren't stock and the carb was more than likely tweaked ( Idk if that means stage 1) to have everything in sync. All I know is bike runs great, however I have nothing to compare it too since this is my first evo. I would assume everything is in order since she runs so strong and smooth. However, she feels a little piggish through the first few gears. This is the main reason I was exploring getting a different air filter….in hopes of a little more acceleration. I've got awesome power from about 45 mph up, no complaints there.
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Club Member
Joined: Jun 2007
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From: Bedford UK
You will only make a gain if you still have the stock airbox. That is a fully enclosed intake silencer with a moulded plastic backplate and chrome front, plus a small air intake pointing down. It is very restrictive and replacement by any decent aftermarket filter (I used SE) with the other improvements mentioned by FXDWG12 will give you decent improvements in performance.
There is no single replacement item that will give a boost in performance! That is advertising hype or internet myth. K&N make good products, but they are only human, like the rest of us! By all means use one, plus the other 'stage 1' changes, if your bike doesn't already have them.
There is no single replacement item that will give a boost in performance! That is advertising hype or internet myth. K&N make good products, but they are only human, like the rest of us! By all means use one, plus the other 'stage 1' changes, if your bike doesn't already have them.
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Road Warrior
Joined: Mar 2009
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From: Toledo, Ohio
Spanners
..is there a difference in performance between filter 0800 and 0900? I've always liked the look of the stock chrome round filter cover, and would like to keep it that way. It looks like filter 0800 is all that I would need to purchase and will fit with stock components. While filter 0900 (oval) would require purchasing a new backplate as well as cover, correct?