[AnCap]

Couple questions.
1: How does a does a Big Sucker, Fuel Moto, SE, or K&N intake increase the intake air flow when the butterfly diameter has changed none.
a: my answer would be the butterfly is capable of more cfm with less restriction
upstream. Is this correct?

b: Will a Big Sucker make any difference with a stock cover as compared to a
K&N filter only under a stock cover?

2: How come they always list Stage 1 intake parts up to 2014 for Touring but don't
include 2015. Is their a difference?

3: Who makes a good airbox if the stuff that fits under a stock cover is a waste of
money?

4: Heard from what I would consider a fairly credible source that there are a pair of
small catalytic converters in the stock mufflers in addition to the converter in the 1
section of the 2-1-2 stock header. Is this true?

 

[ironmark]

Couple questions.
1: How does a does a Big Sucker, Fuel Moto, SE, or K&N intake increase the intake air flow when the butterfly diameter has changed none.
a: my answer would be the butterfly is capable of more cfm with less restriction
upstream. Is this correct?

b: Will a Big Sucker make any difference with a stock cover as compared to a
K&N filter only under a stock cover?

2: How come they always list Stage 1 intake parts up to 2014 for Touring but don't
include 2015. Is their a difference?

3: Who makes a good airbox if the stuff that fits under a stock cover is a waste of
money?

4: Heard from what I would consider a fairly credible source that there are a pair of
small catalytic converters in the stock mufflers in addition to the converter in the 1
section of the 2-1-2 stock header. Is this true?

The engine has 4 cycles
1-intake
2-compression
3-combustion
4-exhaust
Number 1&4 are the easiest mod to do for performance because it is the mods that reduce the strain on the engine.
The easier it is for the engine to draw in air and to expel exhaust gases the more HP and torque gain you have because the engine doesn't have to work as hard to suck in air and to push out exhaust gas.
Any free flowing intake filter will allow the engine to draw in as much air as it can possibly draw in. Take a 103 for example it is only capable to pull in 103 cubic inches or 51.5cubic inches per cylinder of air/fuel per cycle and nothing you can do will change except for pressurizing the intake with a turbo.
So a K&N filter of any kind will allow the engine to draw in air/fuel much easier and there is no advantage to having a Big Sucker because any style K&N will provide more CFM then the engine will ever need .
The same is true with exhaust the less restrictive the exhaust is the easier it is for the engine to push out the exhaust gas which improves HP/torque.
I don't think HD put cats in the mufflers on the newer bikes, the last time HD put cats in the mufflers was in 2008/2009.

 

[AnCap]

Ironmark,
Thanks for your thoughts. Don't know whether it was consciously or unconsciously intended, but there seems to be some irony in the name for that Ness intake.

 

[twistr]

No cat-converter for 2008 models...I think HD started putting them in the exhaust in 2009 and still do

 

[JacktheBagger]

IIRC some '10's had cats , and in '11 they all had cats .. Seems I herd the '15 is in the mufflers , but I dunno .. Good splainin' there Mark

JtB

 

[tdkkart]

Ironmark,
Thanks for your thoughts. Don't know whether it was consciously or unconsciously intended, but there seems to be some irony in the name for that Ness intake.

Despite the irony, and even despite my distaste for some of Ness's antics and styling ideas, the Big Sucker intake is a good design that works as well as anything else on the market. It's the one product that I've bought from Ness, in fact I've owned 3 of them.
For the money, there's not much better out there.

 

[groupw]

[.. .. Seems I herd the '15 is in the mufflers , but I dunno ..

...... i heard the same thing

 

[r_einan]

I can check for you in a couple days, I have a set of '15 take off mufflers and a set if '12 take offs sitting in my shop. I don't think the '15 mufflers looked any different on the inside than the '12 IIRC. But I'll look and report back when I get back home.

*EDIT: To satisfy my curiosity, I used Granite State HDs microfiche online to check the PNs of both the '15 and the '12 mufflers. They are the same PN from Harley. So no, there is no cat in the '15 mufflers.

I can tell you there is still a cat in the head pipe, just like the '12.

 

[Speedie]

...... i heard the same thing

Cat in the header assy (located in the collector as they have done with all late models).

 

[Swomack]

On my 2015 RGS CA bought bike the cat was in the head pipe.
That cat bogs the bike down and the bike runs warmer then I liked.
I bought V&H Tru Duals with the V&H slip-on's and it did make a big difference. The bike runs cooler and the throttle response is much better.
Swomack

 

[ironmark]

No cat-converter for 2008 models...I think HD started putting them in the exhaust in 2009 and still do

My 2008 came with cats in the mufflers and 2009 models had cats in the mufflers too, HD put cats in the head pipes in 2010 to present

 

[dnschmpn]

I have the Big Sucker SS A/C, with S&S head pipe and V&H slip ons and I can keep up with any stock CVO 110.
My tune was done by Doc's Performance in Fl. Much cheaper and I have the accessory theme I want instead of what Harley decided to use. I am very happy with the results.

 

[RoadGlideRider]

My 2008 came with cats in the mufflers and 2009 models had cats in the mufflers too, HD put cats in the head pipes in 2010 to present

Only the California and International models had the Catalytic Converter from the '09 and earlier. Starting with the '09 model year, the converter was moved into the header. There is not any in the muffler. Beginning with the '10 model year, all models have Catalytic Conversation in the Header assembly.