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2013 Airbox Question (stacks)

5094 Views 12 Replies 5 Participants Last post by  smokey11, 
RedAndBlack
Can anybody tell me which stacks are the "short" stacks for the air ducts located inside or connected to the AirBox? I have not been inside the airbox yet and I want to make sure I order the right parts so I avoid return shipping and restocking fees if I'm wrong.

In the attached parts diagram, I am specifically referring to parts:

14073
14073A

I Think 14073 are the short stacks (1 & 4) but you can't tell from the diagram. Appreciate anybody confirming for me if they have pics or go into their airbox a lot. Would spare me having to check myself or ordering the wrong part.

THANKS!!!!!!!!!!!!!!!

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tong53
I don't remember any size difference when I was in there last week. This is the only pic I have of the air box. Not the best but might help?

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RedAndBlack
tong53 said:
I don't remember any size difference when I was in there last week. This is the only pic I have of the air box. Not the best but might help?
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Ughhh! This is the only pics I could find online as well, were top to bottom. So hard to tell.

Thanks anyway.
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Texas636
I currently have my 2014 ripped apart. Let me go out in the garage and check, maybe take some pictures too.
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Texas636
2
I would say the two middle intake stacks are the tall ones and the two outside ones are the short stacks. I don't really see them being built as a short and tall intake stack, just the the two middle ones are tapered at the top, but either way, the outside ones are a tad shorter than the two middle ones.


Here is a picture of the rubber stacks I just took. I hope this helps

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RedAndBlack
Thanks Tex! You're the man.

Honnestly I thought there was a little more of a difference in the stack length, but a lot of what I read about doing this "mod" seemed based on earlier gen bikes. Maybe gotta look back into it.
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d1andonlyant
On my 04 the shorter stacks are much shorter than the taller ones, which maybe means it would make more of a difference than it would on the 13'? And if I remember rightly the 2 talller ones were in the middle on mine too
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smokey11
That's odd when I ordered my velocity stacks from Attack Performance they actually modified the bigger ones or the ones on the outside. I ended up with four modified tall ones. That is strange that you heard to use the shorter stacks...
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d1andonlyant
I thought in the original thread by zx racer it says to use the shorter stacks, hence the name "short stacks mod"? It's been years since I done it but I think that's the way I did
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d1andonlyant
4. Velocity Stacks - remove the 2 "tall" oem stacks in the middle for 2 "short" oem v stacks, this way you will be runnin all 4 short, good for more mid-top end power & thats where our motors like to be
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smokey11
Attack velocity stacks


these appear to be all "tall" ones, or the ones on the outside...
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RedAndBlack
smokey11 said:
That's odd when I ordered my velocity stacks from Attack Performance they actually modified the bigger ones or the ones on the outside. I ended up with four modified tall ones. That is strange that you heard to use the shorter stacks...
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You can do both. Long stacks would end more low end power, taller stacks move some power to high end, where out bikes like to be and where I keep my revs up at the track.
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smokey11
Idk then cause Attack claim 4-5 hp gain with their stacks, but that could be why they modify the tall ones the way they do, they seem to have characteristics of both.
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