as i look at the kit designed for the 2v i dont see any reason why it wont work on a 4v bike. now tpo has come out with a 4v kit minus the pods... go figure. the kit is a set of velocity stacks but no pods, it looks to breath through the normal filter, now maybe someone could help me here cause i can be kind of thick headed but why would the engine care which filter is used. it looks to me that the 2v kit can be used on the 04-06 s4r 4v (the ones without the o2 sensor)bikes just get a power commander and proper tune... any and all feed back with me greatly appreciated....

To answer (and for your pm...) I did the TPO pods on my 01S4...



I had them on my 02 750 first, then when I got the S4, switched them over. All I did was use the rubber pieces that were used on the 750 to connect the throttle bodies to the air box. They are the right diameter for the K&N filters that are used. Easy peasy. Definitely need the PC to adjust the air/fuel mixture. I've been running the S4 like this for 20k miles so far; works great.

Scooby, got a couple more pics at different angles?

The 4v tpo stacks are designed to be used inside the stock airbox.  You might be suprised by this, but going from a proper stack in an airbox too a pod filter almost certinly results in a LOSS of HP (but a vast increase in induction noise).

I contacted TPO about the 4v stacks for the monster, and they told me I would get a 100% refund if I was unsatisfied with them.  If I could find time to get to a dyno, I'd try them out 

thats really odd that you would lose hp... i just want to open that area of the bike up a little and i love the way the pods look...

Quote from: TAftonomos on January 21, 2009, 07:15:07 PM
The 4v tpo stacks are designed to be used inside the stock airbox.  You might be suprised by this, but going from a proper stack in an airbox too a pod filter almost certinly results in a LOSS of HP (but a vast increase in induction noise).

I contacted TPO about the 4v stacks for the monster, and they told me I would get a 100% refund if I was unsatisfied with them.  If I could find time to get to a dyno, I'd try them out 

actually if you read the notes on the 4V TPO it says use the stock filter for the SBK but the K&N for the Monster.

I couldn't find the 4V stacks on their website, are they still available?

http://www.tpoparts.com/catalog/product_info.php?products_id=163

Thanks for that, now I just have to wait for a more favourable exchange rate.

Quote from: Capo on January 22, 2009, 06:00:13 AM
Thanks for that, now I just have to wait for a more favourable exchange rate.

exchange rate? where are you?

Quote from: Raux on January 21, 2009, 10:02:08 PM
actually if you read the notes on the 4V TPO it says use the stock filter for the SBK but the K&N for the Monster.

Yes, because most of the aftermarket filters for 916-998 SBK's take up too much space in the airbox, and hurt performance because of it.

Monster uses a filter that doesn't take away from the volume of the airbox, which is important. 

Now you can see why pods will hurt more than help.

Quote from: TAftonomos on January 22, 2009, 07:17:04 AM
Yes, because most of the aftermarket filters for 916-998 SBK's take up too much space in the airbox, and hurt performance because of it.

Monster uses a filter that doesn't take away from the volume of the airbox, which is important. 

Now you can see why pods will hurt more than help.

would a ram air system be better in this case? Imagine two forward facing funnels directly connected to large tubes containing the pods? I know i'm just imagining things here.

TAftonomos  talk to me about this volume of the airbox thing... is it creating some sort of funnel mini ram air thing? also i'm in atlanta what part of the dirty are you in?

also when i look at the tpo 4v kit i see that the flange part of the TB is larger than stock but is the inner diameter any larger? i dont want to shell out 250 bucks just for a bigger flange at least with the 2v i get the pods and the sound... not to mention i kinda like the loud bike thing... hopefully the cars/trucks can hear you coming now.

The 4V bikes have larger diameter throttle bodies.  I recently cut the tops off a couple of 4V velocity stacks to make my own pod adapters.  It works great, maybe some loss of power but I can't tell it from riding.  On my S4Rs the pods are quieter than the modified airbox lid - at least from the saddle.  I think the air box focused the sound up under the tank towards my head?  The pods send the sound out sideways away from my ears?  Not sure.

typically, the loss or gain of power deals with resonance in the intake tract, similar to tuning an exhaust.  Power loss probably isn't going to be noticable in "seat of the pants", but would show up on a dyno or racetrack.  Since monsters arn't track bikes, who cares .

I like the pods myself.