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[AJN]

2015 cvo street glide s&s 585 cams, thunder max , rinehart true duals will I see anything with a upgraded air cleaner? Are there any on the market better then the factory one? I was looking at the arlein ness twin sucker? Anyone's thoughts?

[Ironhorse]

I'll probably get chewed out for saying this, but for street applications, all the quality filters are probably about the same when it comes to air flow and filtration. Most of the time the choice comes down to what you think looks best on your own bike.

[skratch]

well, i'll stand here with ya then....

with a stock, or only slightly modified engine, almost any air cleaner is going to flow more than your engine needs.  so even though one ac may flow more on the bench, in reall applications, it won't make a bit of difference.  your engine can only pull what it needs, no more.

heavily modified engines, that's a different story.

[grc]

The guys are telling it like it is.  Unless you plan to do some other mods to increase the amount of air flowing through the engine, the stock filter is fine.  It's not like the old days when the first thing we had to do even on a totally stock bike was to add a high flow air cleaner.  The air cleaner that comes stock on your bike these days is already a high flow air cleaner, and it has the advantage of being narrow enough to not interfere with your leg placement on the boards.

This statement taken from the Arlen Ness description of the Twin Sucker should give you an idea of the real selling point:  "New dual runner assembly offers an aggressive look".  Like many intake and exhaust offerings on the market, how cool something looks seems to take top priority for many.  In the exhaust arena there are many pipes that look and sound "cool" but actually hurt performance.  I doubt the Twin Sucker would hurt performance, but I also doubt it would be of any real benefit on your bike.  Spend the $250 on something else IMHO.

Jerry

[HUBBARD]

The Tilley/K&N filter is what I use.  I like the looks, and it takes a trained eye to even notice the difference between it and Stock.  It doesn't interfere with riding comfort at all, as far as I'm concerned.  If you do decide to purchase one, you'll have to get it from Tilley's HD, in Salisbury, NC, as they've got the market cornered on that item.  Don Tilley and Jody York designed it.  Later--HUBBARD 

[HUBBARD]

I like it!  Later--HUBBARD

[Rooster]

I have an extended old style from Zippers on my 07. My tuner installed it under the stock cover. It's just a fatter version of the same K n N I have on my old Evo.

[CVODON]

The extended filters like Hubbard has in his photo is cool, but IMHO, if offers nothing other than looking cool. No appreciable performance increase on a street bike. Not sure where the thought came from that a massive air filter was needed on a twin cylinder HD but the older air filter housing's that had the "coin slot" for air to enter did restrict flow, but the new filters assemblies on our CVO's flow more air than we can use.
Also do some research online, some educated folks feel the K&N style oil impregenated filters are not all they used to be on carb engines with Fuel Injection, that I don't have an opinion on, but I did stop using them 8 - 10 years ago on my personal cars and a few years later on the bike.

[FLSTFI Dave]

The extended filters like Hubbard has in his photo is cool, but IMHO, if offers nothing other than looking cool. No appreciable performance increase on a street bike. Not sure where the thought came from that a massive air filter was needed on a twin cylinder HD but the older air filter housing's that had the "coin slot" for air to enter did restrict flow, but the new filters assemblies on our CVO's flow more air than we can use.
Also do some research online, some educated folks feel the K&N style oil impregenated filters are not all they used to be on carb engines with Fuel Injection, that I don't have an opinion on, but I did stop using them 8 - 10 years ago on my personal cars and a few years later on the bike.

I will agree on a Stock motor.  However if you build the motor, more air is needed.  The stock ventilator CVO air cleaner will not flow enough air for my CVO King, yet works great on my stock CVO Road Glide ultra.  My bet is Hubbard needs the increased air flow, just like I do on my King.  In my case increased air offers me more torque and more HP.

Harley's best air cleaner is the Heavy Breather. 

[Rooster]

Mine was changed when my 131 was re-tuned. I figure it must have helped as he didn't charge me extra just swapped. Or he would have just put the regular KnN back in that I already had.

[HUBBARD]

The extended filters like Hubbard has in his photo is cool, but IMHO, if offers nothing other than looking cool. No appreciable performance increase on a street bike. Not sure where the thought came from that a massive air filter was needed on a twin cylinder HD but the older air filter housing's that had the "coin slot" for air to enter did restrict flow, but the new filters assemblies on our CVO's flow more air than we can use.
Also do some research online, some educated folks feel the K&N style oil impregenated filters are not all they used to be on carb engines with Fuel Injection, that I don't have an opinion on, but I did stop using them 8 - 10 years ago on my personal cars and a few years later on the bike.

It does look cool to me, but it also serves a purpose.  I don't claim to be a Mechanic, but I do have enough intelligence, and experience, that I've gathered over the years, to understand that our Motors are basically no more than an Air-Pump.  I'm not an educated man, so I will try to share my limited knowledge on this subject in "Creek-Boy", kitchen-table language.  How to get the most air into our Engines, and the quickest way to get that air out, is the objective.  It's not the width, or surface area, of the filter, it's how close the backing-plate is to the throat of the induction module.  So, the solution was gettting the back of the backing plate, which btw, had to be modified to accommodate the 64MM TB, off the front of the induction module.  Put your hand directly in front of your mouth, and try to take a deep breath.  Then, move your hand back, and take a deep breath.  That's a lot better, ain't it?  Got your lungs full that time, didn't you?  So...the objective is to get the right air-induction system to get the air in, and the best exhaust, to get the air out.  I know there's a little more to it than that, in Heads, and Valves, and Cams, and Pistons, and TB's, but that's what I pay Jody for.  It's all about AIR.  There endeth the lesson.  Later--HUBBARD