[sirwilliam]

Originally Posted by La Mer

******Warning: The RU-3130 K&N filter and APS CAI will NOT fit on an 06/07 STI.******

I just went through this last night. Save yourself the trouble. The OD of the K&N filter is TOO big.

After many months contemplating setups and deciding what route I want to go w/ my intake, I came across a used APS 65mm CAI. I got it used from a vendor. I got everything and it definitely shows it was used. Here are some pics showing the initial condition of the CAI:




I first wanted to make sure I had all the parts so I was informed of this link: APS 65mm CAI Info Page

I decided that the filter was a little too used for me so I measured the K&N filter that came w/ the APS CAI and then went to the K&N website to find a replacement filter. It was found in the universal cone filter section.

Here is the link to the replacement filter: LINKY

And some pics of the new RU-3130 K&N filter box (b/c who doesn’t like pics!):




Here is a pic of the new filter next to the old used filter (exact match!!! ):



While I was on the K&N site page for the RU-3130, I noticed that at the bottom there were other links to filters. Turns out there are different pre-filters (aka prechargers) you can get to go over the K&N filter to increase time between cleanings. I ended up getting a black and a blue pre-filter (mesh type vs. the foam). FYI, the pre-filters only restrict air flow by 2%.

Here is a link to the black pre-filter: LINKY

Here is a link of the blue pre-filter: LINKY

The blue was back ordered so I only have pics of the black prefilter installed:

[Muffnbluff]

Yeah, it's damn near impossible to not booger those things up when installing/uninstalling them. I've never heard of those pre-filters, that's kind of interesting.

[sirwilliam]

Originally Posted by Muffnbluff

Yeah, it's damn near impossible to not booger those things up when installing/uninstalling them. I've never heard of those pre-filters, that's kind of interesting.

Yes, there are two varieties of pre-filters: Mesh (like I have above) and Foam. The mesh has an elastic band at the bottom to hold it on whereas the foam only wraps around and attaches using velcro.

[gt500]

so how do you like it?

[sirwilliam]

Originally Posted by gt500

so how do you like it?

So far I like it (build quality and design is good) but it hasn't been installed yet. These pics were taken last night before I hit the hay. I have to repaint the intake blue (to match my ride) first before I install it. Hopefully, I can get that done before the new year.

[WolfPlayer]

Welcome to my report from a couple years ago



t

[La Mer]

Nice!!! I've never seen the precharger. I'm going to order one now.

[sirwilliam]

Originally Posted by WolfPlayer

Welcome to my report from a couple years ago



t

Hmm, never saw that report...but it must be a good one.

[Good2Go]

FYI... Amazon.com has the filter for $26 and the pre-filter for $16 with free shipping over $25 spent.

[boost3d05]

i have that intake, i love it w/ the protune....its loud and awesome....i cant wait to see how the blue turns out....take your time! but hurry up w/ the pics! haha

[WolfPlayer]

Originally Posted by Good2Go

FYI... Amazon.com has the filter for $26 and the pre-filter for $16 with free shipping over $25 spent.

Thanks for pointing this out. I just purchased a second one. I like the idea of having a spare on-hand to swap out without worrying about cleaning and drying it on the same day. Can't beat free shipping!

t

[jutes85]

Sweet, I need to change my filter and I was about to ask what part number to get.

Thanks.

[TheLimitedProject]

Does anyone know if the filters above are the same for the 65mm and the 70mm APS intakes?

[DragonXero13]

Thanks for writing this up!

[Skter505]

The pre-filters are generally used for desert/off road guys to keep the big chunks of mud/dirt out of the real filter so you can easily pull it off and clean it, rather than doing the whole washing/drying/oiling of the normal filter. Since the APS puts the filter in the fender, its not so easy just to pull off, refresh and put back on. I dont think it will give longer service intervals for non "dirt" environments...maybe..let us know.